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<center><a href="https://gitlab.com/petsc/petsc/-/blob/966382dc56242773704ef5f5cee7aa2db3ebc577/src/ksp/pc/impls/gamg/gamg.c">Actual source code: gamg.c</a></center><br>
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<pre width=80>
<a name="line1"> 1: </a><font color="#B22222">/*</font>
<a name="line2"> 2: </a><font color="#B22222"> GAMG geometric-algebric multigrid <a href="../../../../../manualpages/PC/PC.html">PC</a> - Mark Adams 2011</font>
<a name="line3"> 3: </a><font color="#B22222"> */</font>
<a name="line4"> 4: </a>#include <A href="../../../../src/ksp/pc/impls/gamg/gamg.h.html"><../src/ksp/pc/impls/gamg/gamg.h></A>
<a name="line5"> 5: </a>#include <A href="../../../../src/ksp/ksp/impls/cheby/chebyshevimpl.h.html"><../src/ksp/ksp/impls/cheby/chebyshevimpl.h></A>
<a name="line7"> 7: </a><font color="#A020F0">#if defined(PETSC_HAVE_CUDA)</font>
<a name="line8"> 8: </a><font color="#A020F0"> #include <cuda_runtime.h></font>
<a name="line9"> 9: </a><font color="#A020F0">#endif</font>
<a name="line11"> 11: </a><font color="#A020F0">#if defined(PETSC_HAVE_HIP)</font>
<a name="line12"> 12: </a><font color="#A020F0"> #include <hip/hip_runtime.h></font>
<a name="line13"> 13: </a><font color="#A020F0">#endif</font>
<a name="line15"> 15: </a><a href="../../../../../manualpages/Log/PetscLogEvent.html">PetscLogEvent</a> petsc_gamg_setup_events[GAMG_NUM_SET];
<a name="line16"> 16: </a><a href="../../../../../manualpages/Log/PetscLogEvent.html">PetscLogEvent</a> petsc_gamg_setup_matmat_events[PETSC_MG_MAXLEVELS][3];
<a name="line18"> 18: </a><font color="#B22222">// #define GAMG_STAGES</font>
<a name="line19"> 19: </a><font color="#A020F0">#if defined(GAMG_STAGES)</font>
<a name="line20"> 20: </a>static <a href="../../../../../manualpages/Log/PetscLogStage.html">PetscLogStage</a> gamg_stages[PETSC_MG_MAXLEVELS];
<a name="line21"> 21: </a><font color="#A020F0">#endif</font>
<a name="line23"> 23: </a>static <a href="../../../../../manualpages/Sys/PetscFunctionList.html">PetscFunctionList</a> GAMGList = NULL;
<a name="line24"> 24: </a>static <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> PCGAMGPackageInitialized;
<a name="line26"> 26: </a><strong><font color="#4169E1"><a name="PCReset_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCReset_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc)</font></strong>
<a name="line27"> 27: </a>{
<a name="line28"> 28: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line29"> 29: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line31"> 31: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line32"> 32: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFree.html">PetscFree</a>(pc_gamg->data));
<a name="line33"> 33: </a> pc_gamg->data_sz = 0;
<a name="line34"> 34: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFree.html">PetscFree</a>(pc_gamg->orig_data));
<a name="line35"> 35: </a> <font color="#4169E1">for</font> (<a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> level = 0; level < PETSC_MG_MAXLEVELS; level++) {
<a name="line36"> 36: </a> mg->min_eigen_DinvA[level] = 0;
<a name="line37"> 37: </a> mg->max_eigen_DinvA[level] = 0;
<a name="line38"> 38: </a> }
<a name="line39"> 39: </a> pc_gamg->emin = 0;
<a name="line40"> 40: </a> pc_gamg->emax = 0;
<a name="line41"> 41: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PCReset_MG(pc));
<a name="line42"> 42: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/MatGraphOperations/MatCoarsenDestroy.html">MatCoarsenDestroy</a>(&pc_gamg->asm_crs));
<a name="line43"> 43: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line44"> 44: </a>}
<a name="line46"> 46: </a><font color="#B22222">/*</font>
<a name="line47"> 47: </a><font color="#B22222"> PCGAMGCreateLevel_GAMG: create coarse op with RAP. repartition and/or reduce number</font>
<a name="line48"> 48: </a><font color="#B22222"> of active processors.</font>
<a name="line50"> 50: </a><font color="#B22222"> Input Parameter:</font>
<a name="line51"> 51: </a><font color="#B22222"> . pc - parameters + side effect: coarse data in 'pc_gamg->data' and</font>
<a name="line52"> 52: </a><font color="#B22222"> 'pc_gamg->data_sz' are changed via repartitioning/reduction.</font>
<a name="line53"> 53: </a><font color="#B22222"> . Amat_fine - matrix on this fine (k) level</font>
<a name="line54"> 54: </a><font color="#B22222"> . cr_bs - coarse block size</font>
<a name="line55"> 55: </a><font color="#B22222"> In/Output Parameter:</font>
<a name="line56"> 56: </a><font color="#B22222"> . a_P_inout - prolongation operator to the next level (k-->k-1)</font>
<a name="line57"> 57: </a><font color="#B22222"> . a_nactive_proc - number of active procs</font>
<a name="line58"> 58: </a><font color="#B22222"> Output Parameter:</font>
<a name="line59"> 59: </a><font color="#B22222"> . a_Amat_crs - coarse matrix that is created (k-1)</font>
<a name="line60"> 60: </a><font color="#B22222">*/</font>
<a name="line61"> 61: </a><strong><font color="#4169E1"><a name="PCGAMGCreateLevel_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGCreateLevel_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> Amat_fine, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> cr_bs, <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> *a_P_inout, <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> *a_Amat_crs, <a href="../../../../../manualpages/Sys/PetscMPIInt.html">PetscMPIInt</a> *a_nactive_proc, <a href="../../../../../manualpages/IS/IS.html">IS</a> *Pcolumnperm, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> is_last)</font></strong>
<a name="line62"> 62: </a>{
<a name="line63"> 63: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line64"> 64: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line65"> 65: </a> <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> Cmat = NULL, Pold = *a_P_inout;
<a name="line66"> 66: </a> <a href="../../../../../manualpages/Sys/MPI_Comm.html">MPI_Comm</a> comm;
<a name="line67"> 67: </a> <a href="../../../../../manualpages/Sys/PetscMPIInt.html">PetscMPIInt</a> rank, size, new_size, nactive = *a_nactive_proc;
<a name="line68"> 68: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> ncrs_eq, ncrs, f_bs;
<a name="line70"> 70: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line71"> 71: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectGetComm.html">PetscObjectGetComm</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)Amat_fine, &comm));
<a name="line72"> 72: </a> <a href="../../../../../manualpages/Sys/PetscCallMPI.html">PetscCallMPI</a>(<a href="http://www.mpich.org/static/docs/latest/www3/MPI_Comm_rank.html#MPI_Comm_rank">MPI_Comm_rank</a>(comm, &rank));
<a name="line73"> 73: </a> <a href="../../../../../manualpages/Sys/PetscCallMPI.html">PetscCallMPI</a>(<a href="http://www.mpich.org/static/docs/latest/www3/MPI_Comm_size.html#MPI_Comm_size">MPI_Comm_size</a>(comm, &size));
<a name="line74"> 74: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetBlockSize.html">MatGetBlockSize</a>(Amat_fine, &f_bs));
<a name="line76"> 76: </a> <font color="#4169E1">if</font> (Pcolumnperm) *Pcolumnperm = NULL;
<a name="line78"> 78: </a> <font color="#B22222">/* set 'ncrs' (nodes), 'ncrs_eq' (equations)*/</font>
<a name="line79"> 79: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetLocalSize.html">MatGetLocalSize</a>(Pold, NULL, &ncrs_eq));
<a name="line80"> 80: </a> <font color="#4169E1">if</font> (pc_gamg->data_cell_rows > 0) {
<a name="line81"> 81: </a> ncrs = pc_gamg->data_sz / pc_gamg->data_cell_cols / pc_gamg->data_cell_rows;
<a name="line82"> 82: </a> } <font color="#4169E1">else</font> {
<a name="line83"> 83: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> bs;
<a name="line84"> 84: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetBlockSizes.html">MatGetBlockSizes</a>(Pold, NULL, &bs));
<a name="line85"> 85: </a> ncrs = ncrs_eq / bs;
<a name="line86"> 86: </a> }
<a name="line87"> 87: </a> <font color="#B22222">/* get number of PEs to make active 'new_size', reduce, can be any integer 1-P */</font>
<a name="line88"> 88: </a> <font color="#4169E1">if</font> (pc_gamg->level_reduction_factors[pc_gamg->current_level] == 0 && <a href="../../../../../manualpages/Sys/PetscDefined.html">PetscDefined</a>(HAVE_CUDA) && pc_gamg->current_level == 0) { <font color="#B22222">/* 0 turns reducing to 1 process/device on; do for HIP, etc. */</font>
<a name="line89"> 89: </a><font color="#A020F0">#if defined(PETSC_HAVE_CUDA)</font>
<a name="line90"> 90: </a> PetscShmComm pshmcomm;
<a name="line91"> 91: </a> <a href="../../../../../manualpages/Sys/PetscMPIInt.html">PetscMPIInt</a> locrank;
<a name="line92"> 92: </a> <a href="../../../../../manualpages/Sys/MPI_Comm.html">MPI_Comm</a> loccomm;
<a name="line93"> 93: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> s_nnodes, r_nnodes, new_new_size;
<a name="line94"> 94: </a> cudaError_t cerr;
<a name="line95"> 95: </a> int devCount;
<a name="line96"> 96: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscShmCommGet.html">PetscShmCommGet</a>(comm, &pshmcomm));
<a name="line97"> 97: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscShmCommGetMpiShmComm.html">PetscShmCommGetMpiShmComm</a>(pshmcomm, &loccomm));
<a name="line98"> 98: </a> <a href="../../../../../manualpages/Sys/PetscCallMPI.html">PetscCallMPI</a>(<a href="http://www.mpich.org/static/docs/latest/www3/MPI_Comm_rank.html#MPI_Comm_rank">MPI_Comm_rank</a>(loccomm, &locrank));
<a name="line99"> 99: </a> s_nnodes = !locrank;
<a name="line100">100: </a> <a href="../../../../../manualpages/Sys/PetscCallMPI.html">PetscCallMPI</a>(<a href="../../../../../manualpages/Sys/MPIU_Allreduce.html">MPIU_Allreduce</a>(&s_nnodes, &r_nnodes, 1, <a href="../../../../../manualpages/Sys/MPIU_INT.html">MPIU_INT</a>, MPI_SUM, comm));
<a name="line101">101: </a> <a href="../../../../../manualpages/Sys/PetscCheck.html">PetscCheck</a>((size % r_nnodes) == 0, <a href="../../../../../manualpages/Sys/PETSC_COMM_SELF.html">PETSC_COMM_SELF</a>, <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_ERR_PLIB</a>, <font color="#666666">"odd number of nodes np=%d nnodes%"</font> PetscInt_FMT, size, r_nnodes);
<a name="line102">102: </a> devCount = 0;
<a name="line103">103: </a> cerr = cudaGetDeviceCount(&devCount);
<a name="line104">104: </a> cudaGetLastError(); <font color="#B22222">/* Reset the last error */</font>
<a name="line105">105: </a> <font color="#4169E1">if</font> (cerr == cudaSuccess && devCount >= 1) { <font color="#B22222">/* There are devices, else go to heuristic */</font>
<a name="line106">106: </a> new_new_size = r_nnodes * devCount;
<a name="line107">107: </a> new_size = new_new_size;
<a name="line108">108: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: Fine grid with Cuda. %"</font> PetscInt_FMT <font color="#666666">" nodes. Change new active set size %d --> %d (devCount=%d #nodes=%"</font> PetscInt_FMT <font color="#666666">")\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, r_nnodes, nactive, new_size, devCount, r_nnodes));
<a name="line109">109: </a> } <font color="#4169E1">else</font> {
<a name="line110">110: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: With Cuda but no device. Use heuristics.\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix));
<a name="line111">111: </a> <font color="#4169E1">goto</font> HEURISTIC;
<a name="line112">112: </a> }
<a name="line113">113: </a><font color="#A020F0">#else</font>
<a name="line114">114: </a> <a href="../../../../../manualpages/Sys/SETERRQ.html">SETERRQ</a>(<a href="../../../../../manualpages/Sys/PETSC_COMM_SELF.html">PETSC_COMM_SELF</a>, <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_ERR_PLIB</a>, <font color="#666666">"should not be here"</font>);
<a name="line115">115: </a><font color="#A020F0">#endif</font>
<a name="line116">116: </a> } <font color="#4169E1">else</font> <font color="#4169E1">if</font> (pc_gamg->level_reduction_factors[pc_gamg->current_level] > 0) {
<a name="line117">117: </a> <font color="#4169E1">if</font> (nactive < pc_gamg->level_reduction_factors[pc_gamg->current_level]) {
<a name="line118">118: </a> new_size = 1;
<a name="line119">119: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: reduction factor too small for %d active processes: reduce to one process\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, new_size));
<a name="line120">120: </a> } <font color="#4169E1">else</font> {
<a name="line121">121: </a> <a href="../../../../../manualpages/Sys/PetscCheck.html">PetscCheck</a>(nactive % pc_gamg->level_reduction_factors[pc_gamg->current_level] == 0, <a href="../../../../../manualpages/Sys/PETSC_COMM_SELF.html">PETSC_COMM_SELF</a>, <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_ERR_PLIB</a>, <font color="#666666">"odd number of active process %d wrt reduction factor %"</font> PetscInt_FMT, nactive, pc_gamg->level_reduction_factors[pc_gamg->current_level]);
<a name="line122">122: </a> new_size = nactive / pc_gamg->level_reduction_factors[pc_gamg->current_level];
<a name="line123">123: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: Manually setting reduction to %d active processes (%d/%"</font> PetscInt_FMT <font color="#666666">")\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, new_size, nactive, pc_gamg->level_reduction_factors[pc_gamg->current_level]));
<a name="line124">124: </a> }
<a name="line125">125: </a> } <font color="#4169E1">else</font> <font color="#4169E1">if</font> (is_last && !pc_gamg->use_parallel_coarse_grid_solver) {
<a name="line126">126: </a> new_size = 1;
<a name="line127">127: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: Force coarsest grid reduction to %d active processes\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, new_size));
<a name="line128">128: </a> } <font color="#4169E1">else</font> {
<a name="line129">129: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> ncrs_eq_glob;
<a name="line130">130: </a><font color="#A020F0">#if defined(PETSC_HAVE_CUDA)</font>
<a name="line131">131: </a> HEURISTIC:
<a name="line132">132: </a><font color="#A020F0">#endif</font>
<a name="line133">133: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetSize.html">MatGetSize</a>(Pold, NULL, &ncrs_eq_glob));
<a name="line134">134: </a> new_size = (<a href="../../../../../manualpages/Sys/PetscMPIInt.html">PetscMPIInt</a>)((float)ncrs_eq_glob / (float)pc_gamg->min_eq_proc + 0.5); <font color="#B22222">/* hardwire min. number of eq/proc */</font>
<a name="line135">135: </a> <font color="#4169E1">if</font> (!new_size) new_size = 1; <font color="#B22222">/* not likely, possible? */</font>
<a name="line136">136: </a> <font color="#4169E1">else</font> <font color="#4169E1">if</font> (new_size >= nactive) new_size = nactive; <font color="#B22222">/* no change, rare */</font>
<a name="line137">137: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: Coarse grid reduction from %d to %d active processes\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, nactive, new_size));
<a name="line138">138: </a> }
<a name="line139">139: </a> <font color="#4169E1">if</font> (new_size == nactive) {
<a name="line140">140: </a> <font color="#B22222">/* output - no repartitioning or reduction - could bail here</font>
<a name="line141">141: </a><font color="#B22222"> we know that the grid structure can be reused in <a href="../../../../../manualpages/Mat/MatPtAP.html">MatPtAP</a> */</font>
<a name="line142">142: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventBegin.html">PetscLogEventBegin</a>(petsc_gamg_setup_events[GAMG_PTAP], 0, 0, 0, 0));
<a name="line143">143: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventBegin.html">PetscLogEventBegin</a>(petsc_gamg_setup_matmat_events[pc_gamg->current_level][1], 0, 0, 0, 0));
<a name="line144">144: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatPtAP.html">MatPtAP</a>(Amat_fine, Pold, <a href="../../../../../manualpages/Mat/MatReuse.html">MAT_INITIAL_MATRIX</a>, 2.0, a_Amat_crs));
<a name="line145">145: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventEnd.html">PetscLogEventEnd</a>(petsc_gamg_setup_matmat_events[pc_gamg->current_level][1], 0, 0, 0, 0));
<a name="line146">146: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventEnd.html">PetscLogEventEnd</a>(petsc_gamg_setup_events[GAMG_PTAP], 0, 0, 0, 0));
<a name="line147">147: </a> <font color="#4169E1">if</font> (new_size < size) {
<a name="line148">148: </a> <font color="#B22222">/* odd case where multiple coarse grids are on one processor or no coarsening ... */</font>
<a name="line149">149: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: reduced grid using same number of processors (%d) as last grid (use larger coarse grid)\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, nactive));
<a name="line150">150: </a> <font color="#4169E1">if</font> (pc_gamg->cpu_pin_coarse_grids) {
<a name="line151">151: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatBindToCPU.html">MatBindToCPU</a>(*a_Amat_crs, <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>));
<a name="line152">152: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatBindToCPU.html">MatBindToCPU</a>(*a_P_inout, <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>));
<a name="line153">153: </a> }
<a name="line154">154: </a> }
<a name="line155">155: </a> } <font color="#4169E1">else</font> { <font color="#B22222">/* reduce active processors - we know that the grid structure can NOT be reused in <a href="../../../../../manualpages/Mat/MatPtAP.html">MatPtAP</a> */</font>
<a name="line156">156: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> *counts, *newproc_idx, ii, jj, kk, strideNew, *tidx, ncrs_new, ncrs_eq_new, nloc_old, expand_factor = 1, rfactor = 1;
<a name="line157">157: </a> <a href="../../../../../manualpages/IS/IS.html">IS</a> is_eq_newproc, is_eq_num, new_eq_indices;
<a name="line158">158: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventBegin.html">PetscLogEventBegin</a>(petsc_gamg_setup_events[GAMG_REDUCE], 0, 0, 0, 0));
<a name="line159">159: </a> nloc_old = ncrs_eq / cr_bs;
<a name="line160">160: </a> <a href="../../../../../manualpages/Sys/PetscCheck.html">PetscCheck</a>(ncrs_eq % cr_bs == 0, <a href="../../../../../manualpages/Sys/PETSC_COMM_SELF.html">PETSC_COMM_SELF</a>, <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_ERR_PLIB</a>, <font color="#666666">"ncrs_eq %"</font> PetscInt_FMT <font color="#666666">" not divisible by cr_bs %"</font> PetscInt_FMT, ncrs_eq, cr_bs);
<a name="line161">161: </a> <font color="#B22222">/* get new_size and rfactor */</font>
<a name="line162">162: </a> <font color="#4169E1">if</font> (pc_gamg->layout_type == <a href="../../../../../manualpages/PC/PCGAMGLayoutType.html">PCGAMG_LAYOUT_SPREAD</a> || !pc_gamg->repart) {
<a name="line163">163: </a> <font color="#B22222">/* find factor */</font>
<a name="line164">164: </a> <font color="#4169E1">if</font> (new_size == 1) rfactor = size; <font color="#B22222">/* don't modify */</font>
<a name="line165">165: </a> <font color="#4169E1">else</font> {
<a name="line166">166: </a> <a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a> best_fact = 0.;
<a name="line167">167: </a> jj = -1;
<a name="line168">168: </a> <font color="#4169E1">for</font> (kk = 1; kk <= size; kk++) {
<a name="line169">169: </a> <font color="#4169E1">if</font> (!(size % kk)) { <font color="#B22222">/* a candidate */</font>
<a name="line170">170: </a> <a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a> nactpe = (<a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a>)size / (<a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a>)kk, fact = nactpe / (<a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a>)new_size;
<a name="line171">171: </a> <font color="#4169E1">if</font> (fact > 1.0) fact = 1. / fact; <font color="#B22222">/* keep fact < 1 */</font>
<a name="line172">172: </a> <font color="#4169E1">if</font> (fact > best_fact) {
<a name="line173">173: </a> best_fact = fact;
<a name="line174">174: </a> jj = kk;
<a name="line175">175: </a> }
<a name="line176">176: </a> }
<a name="line177">177: </a> }
<a name="line178">178: </a> <font color="#4169E1">if</font> (jj != -1) rfactor = jj;
<a name="line179">179: </a> <font color="#4169E1">else</font> rfactor = 1; <font color="#B22222">/* a prime */</font>
<a name="line180">180: </a> <font color="#4169E1">if</font> (pc_gamg->layout_type == <a href="../../../../../manualpages/PC/PCGAMGLayoutType.html">PCGAMG_LAYOUT_COMPACT</a>) expand_factor = 1;
<a name="line181">181: </a> <font color="#4169E1">else</font> expand_factor = rfactor;
<a name="line182">182: </a> }
<a name="line183">183: </a> new_size = size / rfactor; <font color="#B22222">/* make new size one that is factor */</font>
<a name="line184">184: </a> <font color="#4169E1">if</font> (new_size == nactive) { <font color="#B22222">/* no repartitioning or reduction, bail out because nested here (rare) */</font>
<a name="line185">185: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: Finding factorable processor set stopped reduction: new_size=%d, neq(loc)=%"</font> PetscInt_FMT <font color="#666666">"\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, new_size, ncrs_eq));
<a name="line186">186: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventEnd.html">PetscLogEventEnd</a>(petsc_gamg_setup_events[GAMG_REDUCE], 0, 0, 0, 0));
<a name="line187">187: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventBegin.html">PetscLogEventBegin</a>(petsc_gamg_setup_events[GAMG_PTAP], 0, 0, 0, 0));
<a name="line188">188: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventBegin.html">PetscLogEventBegin</a>(petsc_gamg_setup_matmat_events[pc_gamg->current_level][1], 0, 0, 0, 0));
<a name="line189">189: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatPtAP.html">MatPtAP</a>(Amat_fine, Pold, <a href="../../../../../manualpages/Mat/MatReuse.html">MAT_INITIAL_MATRIX</a>, 2.0, a_Amat_crs));
<a name="line190">190: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventEnd.html">PetscLogEventEnd</a>(petsc_gamg_setup_matmat_events[pc_gamg->current_level][1], 0, 0, 0, 0));
<a name="line191">191: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventEnd.html">PetscLogEventEnd</a>(petsc_gamg_setup_events[GAMG_PTAP], 0, 0, 0, 0));
<a name="line192">192: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line193">193: </a> }
<a name="line194">194: </a> }
<a name="line195">195: </a> <font color="#B22222">/* make 'is_eq_newproc' */</font>
<a name="line196">196: </a> <font color="#4169E1">if</font> (pc_gamg->repart) { <font color="#B22222">/* Repartition Cmat_{k} and move columns of P^{k}_{k-1} and coordinates of primal part accordingly */</font>
<a name="line197">197: </a> <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> adj;
<a name="line199">199: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventBegin.html">PetscLogEventBegin</a>(petsc_gamg_setup_events[GAMG_PTAP], 0, 0, 0, 0));
<a name="line200">200: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventBegin.html">PetscLogEventBegin</a>(petsc_gamg_setup_matmat_events[pc_gamg->current_level][1], 0, 0, 0, 0));
<a name="line201">201: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatPtAP.html">MatPtAP</a>(Amat_fine, Pold, <a href="../../../../../manualpages/Mat/MatReuse.html">MAT_INITIAL_MATRIX</a>, 2.0, &Cmat));
<a name="line202">202: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventEnd.html">PetscLogEventEnd</a>(petsc_gamg_setup_matmat_events[pc_gamg->current_level][1], 0, 0, 0, 0));
<a name="line203">203: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventEnd.html">PetscLogEventEnd</a>(petsc_gamg_setup_events[GAMG_PTAP], 0, 0, 0, 0));
<a name="line204">204: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventBegin.html">PetscLogEventBegin</a>(petsc_gamg_setup_events[GAMG_REPART], 0, 0, 0, 0));
<a name="line205">205: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: Repartition: size (active): %d --> %d, %"</font> PetscInt_FMT <font color="#666666">" local equations, using %s process layout\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, *a_nactive_proc, new_size, ncrs_eq, (pc_gamg->layout_type == <a href="../../../../../manualpages/PC/PCGAMGLayoutType.html">PCGAMG_LAYOUT_COMPACT</a>) ? <font color="#666666">"compact"</font> : <font color="#666666">"spread"</font>));
<a name="line206">206: </a> <font color="#B22222">/* get 'adj' */</font>
<a name="line207">207: </a> <font color="#4169E1">if</font> (cr_bs == 1) {
<a name="line208">208: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatConvert.html">MatConvert</a>(Cmat, <a href="../../../../../manualpages/Mat/MATMPIADJ.html">MATMPIADJ</a>, <a href="../../../../../manualpages/Mat/MatReuse.html">MAT_INITIAL_MATRIX</a>, &adj));
<a name="line209">209: </a> } <font color="#4169E1">else</font> {
<a name="line210">210: </a> <font color="#B22222">/* make a scalar matrix to partition (no Stokes here) */</font>
<a name="line211">211: </a> <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> tMat;
<a name="line212">212: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> Istart_crs, Iend_crs, ncols, jj, Ii;
<a name="line213">213: </a> const <a href="../../../../../manualpages/Sys/PetscScalar.html">PetscScalar</a> *vals;
<a name="line214">214: </a> const <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> *idx;
<a name="line215">215: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> *d_nnz, *o_nnz, M, N, maxnnz = 0, *j_buf = NULL;
<a name="line216">216: </a> <a href="../../../../../manualpages/Sys/PetscScalar.html">PetscScalar</a> *v_buff = NULL;
<a name="line217">217: </a> static <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> llev = 0; <font color="#B22222">/* ugly but just used for debugging */</font>
<a name="line218">218: </a> <a href="../../../../../manualpages/Mat/MatType.html">MatType</a> mtype;
<a name="line220">220: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscMalloc2.html">PetscMalloc2</a>(ncrs, &d_nnz, ncrs, &o_nnz));
<a name="line221">221: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetOwnershipRange.html">MatGetOwnershipRange</a>(Cmat, &Istart_crs, &Iend_crs));
<a name="line222">222: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetSize.html">MatGetSize</a>(Cmat, &M, &N));
<a name="line223">223: </a> <font color="#4169E1">for</font> (Ii = Istart_crs, jj = 0; Ii < Iend_crs; Ii += cr_bs, jj++) {
<a name="line224">224: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetRow.html">MatGetRow</a>(Cmat, Ii, &ncols, NULL, NULL));
<a name="line225">225: </a> d_nnz[jj] = ncols / cr_bs;
<a name="line226">226: </a> o_nnz[jj] = ncols / cr_bs;
<a name="line227">227: </a> <font color="#4169E1">if</font> (ncols > maxnnz) maxnnz = ncols;
<a name="line228">228: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatRestoreRow.html">MatRestoreRow</a>(Cmat, Ii, &ncols, NULL, NULL));
<a name="line229">229: </a> <font color="#4169E1">if</font> (d_nnz[jj] > ncrs) d_nnz[jj] = ncrs;
<a name="line230">230: </a> <font color="#4169E1">if</font> (o_nnz[jj] > (M / cr_bs - ncrs)) o_nnz[jj] = M / cr_bs - ncrs;
<a name="line231">231: </a> }
<a name="line233">233: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetType.html">MatGetType</a>(Amat_fine, &mtype));
<a name="line234">234: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatCreate.html">MatCreate</a>(comm, &tMat));
<a name="line235">235: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSetSizes.html">MatSetSizes</a>(tMat, ncrs, ncrs, <a href="../../../../../manualpages/Sys/PETSC_DETERMINE.html">PETSC_DETERMINE</a>, <a href="../../../../../manualpages/Sys/PETSC_DETERMINE.html">PETSC_DETERMINE</a>));
<a name="line236">236: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSetType.html">MatSetType</a>(tMat, mtype));
<a name="line237">237: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSeqAIJSetPreallocation.html">MatSeqAIJSetPreallocation</a>(tMat, 0, d_nnz));
<a name="line238">238: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatMPIAIJSetPreallocation.html">MatMPIAIJSetPreallocation</a>(tMat, 0, d_nnz, 0, o_nnz));
<a name="line239">239: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFree2.html">PetscFree2</a>(d_nnz, o_nnz));
<a name="line240">240: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscMalloc2.html">PetscMalloc2</a>(maxnnz, &j_buf, maxnnz, &v_buff));
<a name="line241">241: </a> <font color="#4169E1">for</font> (ii = 0; ii < maxnnz; ii++) v_buff[ii] = 1.;
<a name="line243">243: </a> <font color="#4169E1">for</font> (ii = Istart_crs; ii < Iend_crs; ii++) {
<a name="line244">244: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> dest_row = ii / cr_bs;
<a name="line245">245: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetRow.html">MatGetRow</a>(Cmat, ii, &ncols, &idx, &vals));
<a name="line246">246: </a> <font color="#4169E1">for</font> (jj = 0; jj < ncols; jj++) j_buf[jj] = idx[jj] / cr_bs;
<a name="line247">247: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSetValues.html">MatSetValues</a>(tMat, 1, &dest_row, ncols, j_buf, v_buff, <a href="../../../../../manualpages/Sys/ADD_VALUES.html">ADD_VALUES</a>));
<a name="line248">248: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatRestoreRow.html">MatRestoreRow</a>(Cmat, ii, &ncols, &idx, &vals));
<a name="line249">249: </a> }
<a name="line250">250: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatAssemblyBegin.html">MatAssemblyBegin</a>(tMat, <a href="../../../../../manualpages/Mat/MatAssemblyType.html">MAT_FINAL_ASSEMBLY</a>));
<a name="line251">251: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatAssemblyEnd.html">MatAssemblyEnd</a>(tMat, <a href="../../../../../manualpages/Mat/MatAssemblyType.html">MAT_FINAL_ASSEMBLY</a>));
<a name="line252">252: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFree2.html">PetscFree2</a>(j_buf, v_buff));
<a name="line254">254: </a> <font color="#4169E1">if</font> (llev++ == -1) {
<a name="line255">255: </a> <a href="../../../../../manualpages/Viewer/PetscViewer.html">PetscViewer</a> viewer;
<a name="line256">256: </a> char fname[32];
<a name="line257">257: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscSNPrintf.html">PetscSNPrintf</a>(fname, <font color="#4169E1">sizeof</font>(fname), <font color="#666666">"part_mat_%"</font> PetscInt_FMT <font color="#666666">".mat"</font>, llev));
<a name="line258">258: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerBinaryOpen.html">PetscViewerBinaryOpen</a>(comm, fname, <a href="../../../../../manualpages/Sys/PetscFileMode.html">FILE_MODE_WRITE</a>, &viewer));
<a name="line259">259: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatView.html">MatView</a>(tMat, viewer));
<a name="line260">260: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerDestroy.html">PetscViewerDestroy</a>(&viewer));
<a name="line261">261: </a> }
<a name="line262">262: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatConvert.html">MatConvert</a>(tMat, <a href="../../../../../manualpages/Mat/MATMPIADJ.html">MATMPIADJ</a>, <a href="../../../../../manualpages/Mat/MatReuse.html">MAT_INITIAL_MATRIX</a>, &adj));
<a name="line263">263: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatDestroy.html">MatDestroy</a>(&tMat));
<a name="line264">264: </a> } <font color="#B22222">/* create 'adj' */</font>
<a name="line266">266: </a> { <font color="#B22222">/* partition: get newproc_idx */</font>
<a name="line267">267: </a> char prefix[256];
<a name="line268">268: </a> const char *pcpre;
<a name="line269">269: </a> const <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> *is_idx;
<a name="line270">270: </a> <a href="../../../../../manualpages/Mat/MatPartitioning.html">MatPartitioning</a> mpart;
<a name="line271">271: </a> <a href="../../../../../manualpages/IS/IS.html">IS</a> proc_is;
<a name="line273">273: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/MatGraphOperations/MatPartitioningCreate.html">MatPartitioningCreate</a>(comm, &mpart));
<a name="line274">274: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/MatGraphOperations/MatPartitioningSetAdjacency.html">MatPartitioningSetAdjacency</a>(mpart, adj));
<a name="line275">275: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCGetOptionsPrefix.html">PCGetOptionsPrefix</a>(pc, &pcpre));
<a name="line276">276: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscSNPrintf.html">PetscSNPrintf</a>(prefix, <font color="#4169E1">sizeof</font>(prefix), <font color="#666666">"%spc_gamg_"</font>, pcpre ? pcpre : <font color="#666666">""</font>));
<a name="line277">277: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectSetOptionsPrefix.html">PetscObjectSetOptionsPrefix</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)mpart, prefix));
<a name="line278">278: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/MatGraphOperations/MatPartitioningSetFromOptions.html">MatPartitioningSetFromOptions</a>(mpart));
<a name="line279">279: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/MatGraphOperations/MatPartitioningSetNParts.html">MatPartitioningSetNParts</a>(mpart, new_size));
<a name="line280">280: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/MatGraphOperations/MatPartitioningApply.html">MatPartitioningApply</a>(mpart, &proc_is));
<a name="line281">281: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/MatGraphOperations/MatPartitioningDestroy.html">MatPartitioningDestroy</a>(&mpart));
<a name="line283">283: </a> <font color="#B22222">/* collect <a href="../../../../../manualpages/IS/IS.html">IS</a> info */</font>
<a name="line284">284: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscMalloc1.html">PetscMalloc1</a>(ncrs_eq, &newproc_idx));
<a name="line285">285: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISGetIndices.html">ISGetIndices</a>(proc_is, &is_idx));
<a name="line286">286: </a> <font color="#4169E1">for</font> (kk = jj = 0; kk < nloc_old; kk++) {
<a name="line287">287: </a> <font color="#4169E1">for</font> (ii = 0; ii < cr_bs; ii++, jj++) { newproc_idx[jj] = is_idx[kk] * expand_factor; <font color="#B22222">/* distribution */</font> }
<a name="line288">288: </a> }
<a name="line289">289: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISRestoreIndices.html">ISRestoreIndices</a>(proc_is, &is_idx));
<a name="line290">290: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISDestroy.html">ISDestroy</a>(&proc_is));
<a name="line291">291: </a> }
<a name="line292">292: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatDestroy.html">MatDestroy</a>(&adj));
<a name="line294">294: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISCreateGeneral.html">ISCreateGeneral</a>(comm, ncrs_eq, newproc_idx, <a href="../../../../../manualpages/Sys/PetscCopyMode.html">PETSC_OWN_POINTER</a>, &is_eq_newproc));
<a name="line295">295: </a> <font color="#B22222">/*</font>
<a name="line296">296: </a><font color="#B22222"> Create an index set from the is_eq_newproc index set to indicate the mapping TO</font>
<a name="line297">297: </a><font color="#B22222"> */</font>
<a name="line298">298: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISPartitioningToNumbering.html">ISPartitioningToNumbering</a>(is_eq_newproc, &is_eq_num));
<a name="line299">299: </a> <font color="#B22222">/*</font>
<a name="line300">300: </a><font color="#B22222"> Determine how many equations/vertices are assigned to each processor</font>
<a name="line301">301: </a><font color="#B22222"> */</font>
<a name="line302">302: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscMalloc1.html">PetscMalloc1</a>(size, &counts));
<a name="line303">303: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISPartitioningCount.html">ISPartitioningCount</a>(is_eq_newproc, size, counts));
<a name="line304">304: </a> ncrs_eq_new = counts[rank];
<a name="line305">305: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISDestroy.html">ISDestroy</a>(&is_eq_newproc));
<a name="line306">306: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFree.html">PetscFree</a>(counts));
<a name="line307">307: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventEnd.html">PetscLogEventEnd</a>(petsc_gamg_setup_events[GAMG_REPART], 0, 0, 0, 0));
<a name="line308">308: </a> } <font color="#4169E1">else</font> { <font color="#B22222">/* simple aggregation of parts -- 'is_eq_newproc' */</font>
<a name="line309">309: </a> const <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> *ranges;
<a name="line310">310: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> newstart = 0;
<a name="line311">311: </a> <a href="../../../../../manualpages/IS/PetscLayout.html">PetscLayout</a> ilay;
<a name="line313">313: </a> <a href="../../../../../manualpages/Sys/PetscCheck.html">PetscCheck</a>(new_size != nactive, <a href="../../../../../manualpages/Sys/PETSC_COMM_SELF.html">PETSC_COMM_SELF</a>, <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_ERR_PLIB</a>, <font color="#666666">"new_size==nactive. Should not happen"</font>);
<a name="line314">314: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: Number of equations (loc) %"</font> PetscInt_FMT <font color="#666666">" with simple aggregation\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, ncrs_eq));
<a name="line315">315: </a> <a href="../../../../../manualpages/Sys/PetscCallMPI.html">PetscCallMPI</a>(<a href="http://www.mpich.org/static/docs/latest/www3/MPI_Exscan.html#MPI_Exscan">MPI_Exscan</a>(&ncrs_eq, &newstart, 1, <a href="../../../../../manualpages/Sys/MPIU_INT.html">MPIU_INT</a>, MPI_SUM, comm));
<a name="line316">316: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISCreateStride.html">ISCreateStride</a>(comm, ncrs_eq, newstart, 1, &is_eq_num));
<a name="line317">317: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISSetPermutation.html">ISSetPermutation</a>(is_eq_num));
<a name="line318">318: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISGetLayout.html">ISGetLayout</a>(is_eq_num, &ilay));
<a name="line319">319: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/PetscLayoutGetRanges.html">PetscLayoutGetRanges</a>(ilay, &ranges));
<a name="line320">320: </a> ncrs_eq_new = 0;
<a name="line321">321: </a> <font color="#4169E1">for</font> (<a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> r = 0; r < size; r++)
<a name="line322">322: </a> <font color="#4169E1">if</font> (rank == (r / rfactor) * expand_factor) ncrs_eq_new += ranges[r + 1] - ranges[r];
<a name="line323">323: </a> <font color="#B22222">//targetPE = (rank / rfactor) * expand_factor;</font>
<a name="line324">324: </a> <font color="#B22222">//<a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISCreateStride.html">ISCreateStride</a>(comm, ncrs_eq, targetPE, 0, &is_eq_newproc));</font>
<a name="line325">325: </a> <font color="#B22222">//<a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISPartitioningToNumbering.html">ISPartitioningToNumbering</a>(is_eq_newproc, &is_eq_num));</font>
<a name="line326">326: </a> <font color="#B22222">//<a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscMalloc1.html">PetscMalloc1</a>(size, &counts));</font>
<a name="line327">327: </a> <font color="#B22222">//<a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISPartitioningCount.html">ISPartitioningCount</a>(is_eq_newproc, size, counts));</font>
<a name="line328">328: </a> <font color="#B22222">//ncrs_eq_new = counts[rank];</font>
<a name="line329">329: </a> <font color="#B22222">//<a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISDestroy.html">ISDestroy</a>(&is_eq_newproc));</font>
<a name="line330">330: </a> <font color="#B22222">//<a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFree.html">PetscFree</a>(counts));</font>
<a name="line331">331: </a> } <font color="#B22222">/* end simple 'is_eq_newproc' */</font>
<a name="line333">333: </a> ncrs_new = ncrs_eq_new / cr_bs;
<a name="line335">335: </a> <font color="#B22222">/* data movement scope -- this could be moved to subclasses so that we don't try to cram all auxiliary data into some complex abstracted thing */</font>
<a name="line336">336: </a> {
<a name="line337">337: </a> <a href="../../../../../manualpages/Vec/Vec.html">Vec</a> src_crd, dest_crd;
<a name="line338">338: </a> const <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> *idx, ndata_rows = pc_gamg->data_cell_rows, ndata_cols = pc_gamg->data_cell_cols, node_data_sz = ndata_rows * ndata_cols;
<a name="line339">339: </a> <a href="../../../../../manualpages/PetscSF/VecScatter.html">VecScatter</a> vecscat;
<a name="line340">340: </a> <a href="../../../../../manualpages/Sys/PetscScalar.html">PetscScalar</a> *array;
<a name="line341">341: </a> <a href="../../../../../manualpages/IS/IS.html">IS</a> isscat;
<a name="line342">342: </a> <font color="#B22222">/* move data (for primal equations only) */</font>
<a name="line343">343: </a> <font color="#B22222">/* Create a vector to contain the newly ordered element information */</font>
<a name="line344">344: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Vec/VecCreate.html">VecCreate</a>(comm, &dest_crd));
<a name="line345">345: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Vec/VecSetSizes.html">VecSetSizes</a>(dest_crd, node_data_sz * ncrs_new, <a href="../../../../../manualpages/Sys/PETSC_DECIDE.html">PETSC_DECIDE</a>));
<a name="line346">346: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Vec/VecSetType.html">VecSetType</a>(dest_crd, <a href="../../../../../manualpages/Vec/VECSTANDARD.html">VECSTANDARD</a>)); <font color="#B22222">/* this is needed! */</font>
<a name="line347">347: </a> <font color="#B22222">/*</font>
<a name="line348">348: </a><font color="#B22222"> There are 'ndata_rows*ndata_cols' data items per node, (one can think of the vectors of having</font>
<a name="line349">349: </a><font color="#B22222"> a block size of ...). Note, ISs are expanded into equation space by 'cr_bs'.</font>
<a name="line350">350: </a><font color="#B22222"> */</font>
<a name="line351">351: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscMalloc1.html">PetscMalloc1</a>(ncrs * node_data_sz, &tidx));
<a name="line352">352: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISGetIndices.html">ISGetIndices</a>(is_eq_num, &idx));
<a name="line353">353: </a> <font color="#4169E1">for</font> (ii = 0, jj = 0; ii < ncrs; ii++) {
<a name="line354">354: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> id = idx[ii * cr_bs] / cr_bs; <font color="#B22222">/* get node back */</font>
<a name="line355">355: </a> <font color="#4169E1">for</font> (kk = 0; kk < node_data_sz; kk++, jj++) tidx[jj] = id * node_data_sz + kk;
<a name="line356">356: </a> }
<a name="line357">357: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISRestoreIndices.html">ISRestoreIndices</a>(is_eq_num, &idx));
<a name="line358">358: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISCreateGeneral.html">ISCreateGeneral</a>(comm, node_data_sz * ncrs, tidx, <a href="../../../../../manualpages/Sys/PetscCopyMode.html">PETSC_COPY_VALUES</a>, &isscat));
<a name="line359">359: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFree.html">PetscFree</a>(tidx));
<a name="line360">360: </a> <font color="#B22222">/*</font>
<a name="line361">361: </a><font color="#B22222"> Create a vector to contain the original vertex information for each element</font>
<a name="line362">362: </a><font color="#B22222"> */</font>
<a name="line363">363: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Vec/VecCreateSeq.html">VecCreateSeq</a>(<a href="../../../../../manualpages/Sys/PETSC_COMM_SELF.html">PETSC_COMM_SELF</a>, node_data_sz * ncrs, &src_crd));
<a name="line364">364: </a> <font color="#4169E1">for</font> (jj = 0; jj < ndata_cols; jj++) {
<a name="line365">365: </a> const <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> stride0 = ncrs * pc_gamg->data_cell_rows;
<a name="line366">366: </a> <font color="#4169E1">for</font> (ii = 0; ii < ncrs; ii++) {
<a name="line367">367: </a> <font color="#4169E1">for</font> (kk = 0; kk < ndata_rows; kk++) {
<a name="line368">368: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> ix = ii * ndata_rows + kk + jj * stride0, jx = ii * node_data_sz + kk * ndata_cols + jj;
<a name="line369">369: </a> <a href="../../../../../manualpages/Sys/PetscScalar.html">PetscScalar</a> tt = pc_gamg->data[ix];
<a name="line370">370: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Vec/VecSetValues.html">VecSetValues</a>(src_crd, 1, &jx, &tt, <a href="../../../../../manualpages/Sys/INSERT_VALUES.html">INSERT_VALUES</a>));
<a name="line371">371: </a> }
<a name="line372">372: </a> }
<a name="line373">373: </a> }
<a name="line374">374: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Vec/VecAssemblyBegin.html">VecAssemblyBegin</a>(src_crd));
<a name="line375">375: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Vec/VecAssemblyEnd.html">VecAssemblyEnd</a>(src_crd));
<a name="line376">376: </a> <font color="#B22222">/*</font>
<a name="line377">377: </a><font color="#B22222"> Scatter the element vertex information (still in the original vertex ordering)</font>
<a name="line378">378: </a><font color="#B22222"> to the correct processor</font>
<a name="line379">379: </a><font color="#B22222"> */</font>
<a name="line380">380: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Vec/VecScatterCreate.html">VecScatterCreate</a>(src_crd, NULL, dest_crd, isscat, &vecscat));
<a name="line381">381: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISDestroy.html">ISDestroy</a>(&isscat));
<a name="line382">382: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Vec/VecScatterBegin.html">VecScatterBegin</a>(vecscat, src_crd, dest_crd, <a href="../../../../../manualpages/Sys/INSERT_VALUES.html">INSERT_VALUES</a>, <a href="../../../../../manualpages/Vec/SCATTER_FORWARD.html">SCATTER_FORWARD</a>));
<a name="line383">383: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Vec/VecScatterEnd.html">VecScatterEnd</a>(vecscat, src_crd, dest_crd, <a href="../../../../../manualpages/Sys/INSERT_VALUES.html">INSERT_VALUES</a>, <a href="../../../../../manualpages/Vec/SCATTER_FORWARD.html">SCATTER_FORWARD</a>));
<a name="line384">384: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Vec/VecScatterDestroy.html">VecScatterDestroy</a>(&vecscat));
<a name="line385">385: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Vec/VecDestroy.html">VecDestroy</a>(&src_crd));
<a name="line386">386: </a> <font color="#B22222">/*</font>
<a name="line387">387: </a><font color="#B22222"> Put the element vertex data into a new allocation of the gdata->ele</font>
<a name="line388">388: </a><font color="#B22222"> */</font>
<a name="line389">389: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFree.html">PetscFree</a>(pc_gamg->data));
<a name="line390">390: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscMalloc1.html">PetscMalloc1</a>(node_data_sz * ncrs_new, &pc_gamg->data));
<a name="line392">392: </a> pc_gamg->data_sz = node_data_sz * ncrs_new;
<a name="line393">393: </a> strideNew = ncrs_new * ndata_rows;
<a name="line395">395: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Vec/VecGetArray.html">VecGetArray</a>(dest_crd, &array));
<a name="line396">396: </a> <font color="#4169E1">for</font> (jj = 0; jj < ndata_cols; jj++) {
<a name="line397">397: </a> <font color="#4169E1">for</font> (ii = 0; ii < ncrs_new; ii++) {
<a name="line398">398: </a> <font color="#4169E1">for</font> (kk = 0; kk < ndata_rows; kk++) {
<a name="line399">399: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> ix = ii * ndata_rows + kk + jj * strideNew, jx = ii * node_data_sz + kk * ndata_cols + jj;
<a name="line400">400: </a> pc_gamg->data[ix] = <a href="../../../../../manualpages/Sys/PetscRealPart.html">PetscRealPart</a>(array[jx]);
<a name="line401">401: </a> }
<a name="line402">402: </a> }
<a name="line403">403: </a> }
<a name="line404">404: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Vec/VecRestoreArray.html">VecRestoreArray</a>(dest_crd, &array));
<a name="line405">405: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Vec/VecDestroy.html">VecDestroy</a>(&dest_crd));
<a name="line406">406: </a> }
<a name="line407">407: </a> <font color="#B22222">/* move A and P (columns) with new layout */</font>
<a name="line408">408: </a> <font color="#B22222">/*</font>
<a name="line409">409: </a><font color="#B22222"> Invert for <a href="../../../../../manualpages/Mat/MatCreateSubMatrix.html">MatCreateSubMatrix</a></font>
<a name="line410">410: </a><font color="#B22222"> */</font>
<a name="line411">411: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISInvertPermutation.html">ISInvertPermutation</a>(is_eq_num, ncrs_eq_new, &new_eq_indices));
<a name="line412">412: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISSort.html">ISSort</a>(new_eq_indices));
<a name="line413">413: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISSetBlockSize.html">ISSetBlockSize</a>(new_eq_indices, cr_bs));
<a name="line414">414: </a> <font color="#4169E1">if</font> (Pcolumnperm) {
<a name="line415">415: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectReference.html">PetscObjectReference</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)new_eq_indices));
<a name="line416">416: </a> *Pcolumnperm = new_eq_indices;
<a name="line417">417: </a> }
<a name="line418">418: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISDestroy.html">ISDestroy</a>(&is_eq_num));
<a name="line420">420: </a> <font color="#B22222">/* 'a_Amat_crs' output */</font>
<a name="line421">421: </a> <font color="#4169E1">if</font> (Cmat) { <font color="#B22222">/* repartitioning from Cmat adjacency case */</font>
<a name="line422">422: </a> <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> mat;
<a name="line423">423: </a> <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> isset, isspd, isher;
<a name="line424">424: </a><font color="#A020F0">#if !defined(PETSC_USE_COMPLEX)</font>
<a name="line425">425: </a> <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> issym;
<a name="line426">426: </a><font color="#A020F0">#endif</font>
<a name="line428">428: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatCreateSubMatrix.html">MatCreateSubMatrix</a>(Cmat, new_eq_indices, new_eq_indices, <a href="../../../../../manualpages/Mat/MatReuse.html">MAT_INITIAL_MATRIX</a>, &mat));
<a name="line429">429: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatIsSPDKnown.html">MatIsSPDKnown</a>(Cmat, &isset, &isspd)); <font color="#B22222">// like <a href="../../../../../manualpages/Mat/MatPropagateSymmetryOptions.html">MatPropagateSymmetryOptions</a>, but should set <a href="../../../../../manualpages/Mat/MatOption.html">MAT_STRUCTURALLY_SYMMETRIC</a> ?</font>
<a name="line430">430: </a> <font color="#4169E1">if</font> (isset) <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSetOption.html">MatSetOption</a>(mat, <a href="../../../../../manualpages/Mat/MatOption.html">MAT_SPD</a>, isspd));
<a name="line431">431: </a> <font color="#4169E1">else</font> {
<a name="line432">432: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatIsHermitianKnown.html">MatIsHermitianKnown</a>(Cmat, &isset, &isher));
<a name="line433">433: </a> <font color="#4169E1">if</font> (isset) <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSetOption.html">MatSetOption</a>(mat, <a href="../../../../../manualpages/Mat/MatOption.html">MAT_HERMITIAN</a>, isher));
<a name="line434">434: </a> <font color="#4169E1">else</font> {
<a name="line435">435: </a><font color="#A020F0">#if !defined(PETSC_USE_COMPLEX)</font>
<a name="line436">436: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatIsSymmetricKnown.html">MatIsSymmetricKnown</a>(Cmat, &isset, &issym));
<a name="line437">437: </a> <font color="#4169E1">if</font> (isset) <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSetOption.html">MatSetOption</a>(mat, <a href="../../../../../manualpages/Mat/MatOption.html">MAT_SYMMETRIC</a>, issym));
<a name="line438">438: </a><font color="#A020F0">#endif</font>
<a name="line439">439: </a> }
<a name="line440">440: </a> }
<a name="line441">441: </a> *a_Amat_crs = mat;
<a name="line442">442: </a> }
<a name="line444">444: </a> <font color="#B22222">/* prolongator */</font>
<a name="line445">445: </a> {
<a name="line446">446: </a> <a href="../../../../../manualpages/IS/IS.html">IS</a> findices;
<a name="line447">447: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> Istart, Iend;
<a name="line448">448: </a> <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> Pnew;
<a name="line450">450: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetOwnershipRange.html">MatGetOwnershipRange</a>(Pold, &Istart, &Iend));
<a name="line451">451: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISCreateStride.html">ISCreateStride</a>(comm, Iend - Istart, Istart, 1, &findices));
<a name="line452">452: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISSetBlockSize.html">ISSetBlockSize</a>(findices, f_bs));
<a name="line453">453: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatCreateSubMatrix.html">MatCreateSubMatrix</a>(Pold, findices, new_eq_indices, <a href="../../../../../manualpages/Mat/MatReuse.html">MAT_INITIAL_MATRIX</a>, &Pnew));
<a name="line454">454: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISDestroy.html">ISDestroy</a>(&findices));
<a name="line455">455: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSetOption.html">MatSetOption</a>(Pnew, <a href="../../../../../manualpages/Mat/MatOption.html">MAT_FORM_EXPLICIT_TRANSPOSE</a>, <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>));
<a name="line457">457: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatDestroy.html">MatDestroy</a>(a_P_inout));
<a name="line459">459: </a> <font color="#B22222">/* output - repartitioned */</font>
<a name="line460">460: </a> *a_P_inout = Pnew;
<a name="line461">461: </a> }
<a name="line463">463: </a> <font color="#4169E1">if</font> (!Cmat) { <font color="#B22222">/* simple repartitioning case */</font>
<a name="line464">464: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventBegin.html">PetscLogEventBegin</a>(petsc_gamg_setup_events[GAMG_PTAP], 0, 0, 0, 0));
<a name="line465">465: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventBegin.html">PetscLogEventBegin</a>(petsc_gamg_setup_matmat_events[pc_gamg->current_level][1], 0, 0, 0, 0));
<a name="line466">466: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatPtAP.html">MatPtAP</a>(Amat_fine, *a_P_inout, <a href="../../../../../manualpages/Mat/MatReuse.html">MAT_INITIAL_MATRIX</a>, 2.0, a_Amat_crs));
<a name="line467">467: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventEnd.html">PetscLogEventEnd</a>(petsc_gamg_setup_matmat_events[pc_gamg->current_level][1], 0, 0, 0, 0));
<a name="line468">468: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventEnd.html">PetscLogEventEnd</a>(petsc_gamg_setup_events[GAMG_PTAP], 0, 0, 0, 0));
<a name="line469">469: </a> }
<a name="line470">470: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatDestroy.html">MatDestroy</a>(&Cmat));
<a name="line471">471: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISDestroy.html">ISDestroy</a>(&new_eq_indices));
<a name="line473">473: </a> *a_nactive_proc = new_size; <font color="#B22222">/* output */</font>
<a name="line475">475: </a> <font color="#B22222">/* pinning on reduced grids, not a bad heuristic and optimization gets folded into process reduction optimization */</font>
<a name="line476">476: </a> <font color="#4169E1">if</font> (pc_gamg->cpu_pin_coarse_grids) {
<a name="line477">477: </a><font color="#A020F0">#if defined(PETSC_HAVE_VIENNACL) || defined(PETSC_HAVE_CUDA)</font>
<a name="line478">478: </a> static <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> llev = 2;
<a name="line479">479: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: Pinning level %"</font> PetscInt_FMT <font color="#666666">" to the CPU\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, llev++));
<a name="line480">480: </a><font color="#A020F0">#endif</font>
<a name="line481">481: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatBindToCPU.html">MatBindToCPU</a>(*a_Amat_crs, <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>));
<a name="line482">482: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatBindToCPU.html">MatBindToCPU</a>(*a_P_inout, <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>));
<a name="line483">483: </a> <font color="#4169E1">if</font> (1) { <font color="#B22222">/* HACK: move this to MatBindCPU_MPIAIJXXX; lvec is created, need to pin it, this is done in MatSetUpMultiply_MPIAIJ. Hack */</font>
<a name="line484">484: </a> <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> A = *a_Amat_crs, P = *a_P_inout;
<a name="line485">485: </a> <a href="../../../../../manualpages/Sys/PetscMPIInt.html">PetscMPIInt</a> size;
<a name="line486">486: </a> <a href="../../../../../manualpages/Sys/PetscCallMPI.html">PetscCallMPI</a>(<a href="http://www.mpich.org/static/docs/latest/www3/MPI_Comm_size.html#MPI_Comm_size">MPI_Comm_size</a>(<a href="../../../../../manualpages/Sys/PetscObjectComm.html">PetscObjectComm</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)A), &size));
<a name="line487">487: </a> <font color="#4169E1">if</font> (size > 1) {
<a name="line488">488: </a> Mat_MPIAIJ *a = (Mat_MPIAIJ *)A->data, *p = (Mat_MPIAIJ *)P->data;
<a name="line489">489: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Vec/VecBindToCPU.html">VecBindToCPU</a>(a->lvec, <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>));
<a name="line490">490: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Vec/VecBindToCPU.html">VecBindToCPU</a>(p->lvec, <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>));
<a name="line491">491: </a> }
<a name="line492">492: </a> }
<a name="line493">493: </a> }
<a name="line494">494: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventEnd.html">PetscLogEventEnd</a>(petsc_gamg_setup_events[GAMG_REDUCE], 0, 0, 0, 0));
<a name="line495">495: </a> } <font color="#B22222">// processor reduce</font>
<a name="line496">496: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line497">497: </a>}
<a name="line499">499: </a><font color="#B22222">// used in GEO</font>
<a name="line500">500: </a><strong><font color="#4169E1"><a name="PCGAMGSquareGraph_GAMG"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGSquareGraph_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> a_pc, <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> Gmat1, <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> *Gmat2)</font></strong>
<a name="line501">501: </a>{
<a name="line502">502: </a> const char *prefix;
<a name="line503">503: </a> char addp[32];
<a name="line504">504: </a> PC_MG *mg = (PC_MG *)a_pc->data;
<a name="line505">505: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line507">507: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line508">508: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCGetOptionsPrefix.html">PCGetOptionsPrefix</a>(a_pc, &prefix));
<a name="line509">509: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(a_pc, <font color="#666666">"%s: Square Graph on level %"</font> PetscInt_FMT <font color="#666666">"\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)a_pc)->prefix, pc_gamg->current_level + 1));
<a name="line510">510: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatProductCreate.html">MatProductCreate</a>(Gmat1, Gmat1, NULL, Gmat2));
<a name="line511">511: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSetOptionsPrefix.html">MatSetOptionsPrefix</a>(*Gmat2, prefix));
<a name="line512">512: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscSNPrintf.html">PetscSNPrintf</a>(addp, <font color="#4169E1">sizeof</font>(addp), <font color="#666666">"pc_gamg_square_%"</font> PetscInt_FMT <font color="#666666">"_"</font>, pc_gamg->current_level));
<a name="line513">513: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatAppendOptionsPrefix.html">MatAppendOptionsPrefix</a>(*Gmat2, addp));
<a name="line514">514: </a> <font color="#4169E1">if</font> ((*Gmat2)->structurally_symmetric == <a href="../../../../../manualpages/Sys/PetscBool3.html">PETSC_BOOL3_TRUE</a>) {
<a name="line515">515: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatProductSetType.html">MatProductSetType</a>(*Gmat2, <a href="../../../../../manualpages/Mat/MatProductType.html">MATPRODUCT_AB</a>));
<a name="line516">516: </a> } <font color="#4169E1">else</font> {
<a name="line517">517: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSetOption.html">MatSetOption</a>(Gmat1, <a href="../../../../../manualpages/Mat/MatOption.html">MAT_FORM_EXPLICIT_TRANSPOSE</a>, <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>));
<a name="line518">518: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatProductSetType.html">MatProductSetType</a>(*Gmat2, <a href="../../../../../manualpages/Mat/MatProductType.html">MATPRODUCT_AtB</a>));
<a name="line519">519: </a> }
<a name="line520">520: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatProductSetFromOptions.html">MatProductSetFromOptions</a>(*Gmat2));
<a name="line521">521: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventBegin.html">PetscLogEventBegin</a>(petsc_gamg_setup_matmat_events[pc_gamg->current_level][0], 0, 0, 0, 0));
<a name="line522">522: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatProductSymbolic.html">MatProductSymbolic</a>(*Gmat2));
<a name="line523">523: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventEnd.html">PetscLogEventEnd</a>(petsc_gamg_setup_matmat_events[pc_gamg->current_level][0], 0, 0, 0, 0));
<a name="line524">524: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatProductClear.html">MatProductClear</a>(*Gmat2));
<a name="line525">525: </a> <font color="#B22222">/* we only need the sparsity, cheat and tell PETSc the matrix has been assembled */</font>
<a name="line526">526: </a> (*Gmat2)->assembled = <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>;
<a name="line527">527: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line528">528: </a>}
<a name="line530">530: </a><font color="#B22222">/*</font>
<a name="line531">531: </a><font color="#B22222"> PCSetUp_GAMG - Prepares for the use of the GAMG preconditioner</font>
<a name="line532">532: </a><font color="#B22222"> by setting data structures and options.</font>
<a name="line534">534: </a><font color="#B22222"> Input Parameter:</font>
<a name="line535">535: </a><font color="#B22222">. pc - the preconditioner context</font>
<a name="line537">537: </a><font color="#B22222">*/</font>
<a name="line538">538: </a><strong><font color="#4169E1"><a name="PCSetUp_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCSetUp_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc)</font></strong>
<a name="line539">539: </a>{
<a name="line540">540: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line541">541: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line542">542: </a> <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> Pmat = pc->pmat;
<a name="line543">543: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> fine_level, level, level1, bs, M, N, qq, lidx, nASMBlocksArr[PETSC_MG_MAXLEVELS], cr_bs;
<a name="line544">544: </a> <a href="../../../../../manualpages/Sys/MPI_Comm.html">MPI_Comm</a> comm;
<a name="line545">545: </a> <a href="../../../../../manualpages/Sys/PetscMPIInt.html">PetscMPIInt</a> rank, size, nactivepe;
<a name="line546">546: </a> <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> Aarr[PETSC_MG_MAXLEVELS], Parr[PETSC_MG_MAXLEVELS];
<a name="line547">547: </a> <a href="../../../../../manualpages/IS/IS.html">IS</a> *ASMLocalIDsArr[PETSC_MG_MAXLEVELS];
<a name="line548">548: </a> <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> is_last = <a href="../../../../../manualpages/Sys/PETSC_FALSE.html">PETSC_FALSE</a>;
<a name="line549">549: </a><font color="#A020F0">#if defined(PETSC_USE_INFO)</font>
<a name="line550">550: </a> <a href="../../../../../manualpages/Sys/PetscLogDouble.html">PetscLogDouble</a> nnz0 = 0., nnztot = 0.;
<a name="line551">551: </a> <a href="../../../../../manualpages/Mat/MatInfo.html">MatInfo</a> info;
<a name="line552">552: </a><font color="#A020F0">#endif</font>
<a name="line554">554: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line555">555: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectGetComm.html">PetscObjectGetComm</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, &comm));
<a name="line556">556: </a> <a href="../../../../../manualpages/Sys/PetscCallMPI.html">PetscCallMPI</a>(<a href="http://www.mpich.org/static/docs/latest/www3/MPI_Comm_rank.html#MPI_Comm_rank">MPI_Comm_rank</a>(comm, &rank));
<a name="line557">557: </a> <a href="../../../../../manualpages/Sys/PetscCallMPI.html">PetscCallMPI</a>(<a href="http://www.mpich.org/static/docs/latest/www3/MPI_Comm_size.html#MPI_Comm_size">MPI_Comm_size</a>(comm, &size));
<a name="line558">558: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventBegin.html">PetscLogEventBegin</a>(petsc_gamg_setup_events[GAMG_SETUP], 0, 0, 0, 0));
<a name="line559">559: </a> <font color="#4169E1">if</font> (pc->setupcalled) {
<a name="line560">560: </a> <font color="#4169E1">if</font> (!pc_gamg->reuse_prol || pc->flag == <a href="../../../../../manualpages/Mat/MatStructure.html">DIFFERENT_NONZERO_PATTERN</a>) {
<a name="line561">561: </a> <font color="#B22222">/* reset everything */</font>
<a name="line562">562: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PCReset_MG(pc));
<a name="line563">563: </a> pc->setupcalled = 0;
<a name="line564">564: </a> } <font color="#4169E1">else</font> {
<a name="line565">565: </a> PC_MG_Levels **mglevels = mg->levels;
<a name="line566">566: </a> <font color="#B22222">/* just do Galerkin grids */</font>
<a name="line567">567: </a> <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> B, dA, dB;
<a name="line568">568: </a> <font color="#4169E1">if</font> (pc_gamg->Nlevels > 1) {
<a name="line569">569: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> gl;
<a name="line570">570: </a> <font color="#B22222">/* currently only handle case where mat and pmat are the same on coarser levels */</font>
<a name="line571">571: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/KSP/KSPGetOperators.html">KSPGetOperators</a>(mglevels[pc_gamg->Nlevels - 1]->smoothd, &dA, &dB));
<a name="line572">572: </a> <font color="#B22222">/* (re)set to get dirty flag */</font>
<a name="line573">573: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/KSP/KSPSetOperators.html">KSPSetOperators</a>(mglevels[pc_gamg->Nlevels - 1]->smoothd, dA, dB));
<a name="line575">575: </a> <font color="#4169E1">for</font> (level = pc_gamg->Nlevels - 2, gl = 0; level >= 0; level--, gl++) {
<a name="line576">576: </a> <a href="../../../../../manualpages/Mat/MatReuse.html">MatReuse</a> reuse = <a href="../../../../../manualpages/Mat/MatReuse.html">MAT_INITIAL_MATRIX</a>;
<a name="line577">577: </a><font color="#A020F0">#if defined(GAMG_STAGES)</font>
<a name="line578">578: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogStagePush.html">PetscLogStagePush</a>(gamg_stages[gl]));
<a name="line579">579: </a><font color="#A020F0">#endif</font>
<a name="line580">580: </a> <font color="#B22222">/* matrix nonzero structure can change from repartitioning or process reduction but don't know if we have process reduction here. Should fix */</font>
<a name="line581">581: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/KSP/KSPGetOperators.html">KSPGetOperators</a>(mglevels[level]->smoothd, NULL, &B));
<a name="line582">582: </a> <font color="#4169E1">if</font> (B->product) {
<a name="line583">583: </a> <font color="#4169E1">if</font> (B->product->A == dB && B->product->B == mglevels[level + 1]->interpolate) reuse = <a href="../../../../../manualpages/Mat/MatReuse.html">MAT_REUSE_MATRIX</a>;
<a name="line584">584: </a> }
<a name="line585">585: </a> <font color="#4169E1">if</font> (reuse == <a href="../../../../../manualpages/Mat/MatReuse.html">MAT_INITIAL_MATRIX</a>) <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatDestroy.html">MatDestroy</a>(&mglevels[level]->A));
<a name="line586">586: </a> <font color="#4169E1">if</font> (reuse == <a href="../../../../../manualpages/Mat/MatReuse.html">MAT_REUSE_MATRIX</a>) {
<a name="line587">587: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: RAP after initial setup, reuse matrix level %"</font> PetscInt_FMT <font color="#666666">"\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, level));
<a name="line588">588: </a> } <font color="#4169E1">else</font> {
<a name="line589">589: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: RAP after initial setup, with repartitioning (new matrix) level %"</font> PetscInt_FMT <font color="#666666">"\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, level));
<a name="line590">590: </a> }
<a name="line591">591: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventBegin.html">PetscLogEventBegin</a>(petsc_gamg_setup_matmat_events[gl][1], 0, 0, 0, 0));
<a name="line592">592: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatPtAP.html">MatPtAP</a>(dB, mglevels[level + 1]->interpolate, reuse, <a href="../../../../../manualpages/Sys/PETSC_DETERMINE.html">PETSC_DETERMINE</a>, &B));
<a name="line593">593: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventEnd.html">PetscLogEventEnd</a>(petsc_gamg_setup_matmat_events[gl][1], 0, 0, 0, 0));
<a name="line594">594: </a> <font color="#4169E1">if</font> (reuse == <a href="../../../../../manualpages/Mat/MatReuse.html">MAT_INITIAL_MATRIX</a>) mglevels[level]->A = B;
<a name="line595">595: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/KSP/KSPSetOperators.html">KSPSetOperators</a>(mglevels[level]->smoothd, B, B));
<a name="line596">596: </a> <font color="#B22222">// check for redoing eigen estimates</font>
<a name="line597">597: </a> <font color="#4169E1">if</font> (pc_gamg->recompute_esteig) {
<a name="line598">598: </a> <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> ischeb;
<a name="line599">599: </a> <a href="../../../../../manualpages/KSP/KSP.html">KSP</a> smoother;
<a name="line600">600: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCMGGetSmoother.html">PCMGGetSmoother</a>(pc, level + 1, &smoother));
<a name="line601">601: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectTypeCompare.html">PetscObjectTypeCompare</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)smoother, <a href="../../../../../manualpages/KSP/KSPCHEBYSHEV.html">KSPCHEBYSHEV</a>, &ischeb));
<a name="line602">602: </a> <font color="#4169E1">if</font> (ischeb) {
<a name="line603">603: </a> KSP_Chebyshev *cheb = (KSP_Chebyshev *)smoother->data;
<a name="line604">604: </a> cheb->emin_provided = 0;
<a name="line605">605: </a> cheb->emax_provided = 0;
<a name="line606">606: </a> }
<a name="line607">607: </a> <font color="#B22222">/* we could call <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/KSP/KSPChebyshevSetEigenvalues.html">KSPChebyshevSetEigenvalues</a>(smoother, 0, 0)); but the logic does not work properly */</font>
<a name="line608">608: </a> }
<a name="line609">609: </a> <font color="#B22222">// inc</font>
<a name="line610">610: </a> dB = B;
<a name="line611">611: </a><font color="#A020F0">#if defined(GAMG_STAGES)</font>
<a name="line612">612: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogStagePop.html">PetscLogStagePop</a>());
<a name="line613">613: </a><font color="#A020F0">#endif</font>
<a name="line614">614: </a> }
<a name="line615">615: </a> }
<a name="line617">617: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PCSetUp_MG(pc));
<a name="line618">618: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventEnd.html">PetscLogEventEnd</a>(petsc_gamg_setup_events[GAMG_SETUP], 0, 0, 0, 0));
<a name="line619">619: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line620">620: </a> }
<a name="line621">621: </a> }
<a name="line623">623: </a> <font color="#4169E1">if</font> (!pc_gamg->data) {
<a name="line624">624: </a> <font color="#4169E1">if</font> (pc_gamg->orig_data) {
<a name="line625">625: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetBlockSize.html">MatGetBlockSize</a>(Pmat, &bs));
<a name="line626">626: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetLocalSize.html">MatGetLocalSize</a>(Pmat, &qq, NULL));
<a name="line628">628: </a> pc_gamg->data_sz = (qq / bs) * pc_gamg->orig_data_cell_rows * pc_gamg->orig_data_cell_cols;
<a name="line629">629: </a> pc_gamg->data_cell_rows = pc_gamg->orig_data_cell_rows;
<a name="line630">630: </a> pc_gamg->data_cell_cols = pc_gamg->orig_data_cell_cols;
<a name="line632">632: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscMalloc1.html">PetscMalloc1</a>(pc_gamg->data_sz, &pc_gamg->data));
<a name="line633">633: </a> <font color="#4169E1">for</font> (qq = 0; qq < pc_gamg->data_sz; qq++) pc_gamg->data[qq] = pc_gamg->orig_data[qq];
<a name="line634">634: </a> } <font color="#4169E1">else</font> {
<a name="line635">635: </a> <a href="../../../../../manualpages/Sys/PetscCheck.html">PetscCheck</a>(pc_gamg->ops->createdefaultdata, comm, <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_ERR_PLIB</a>, <font color="#666666">"'createdefaultdata' not set(?) need to support NULL data"</font>);
<a name="line636">636: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(pc_gamg->ops->createdefaultdata(pc, Pmat));
<a name="line637">637: </a> }
<a name="line638">638: </a> }
<a name="line640">640: </a> <font color="#B22222">/* cache original data for reuse */</font>
<a name="line641">641: </a> <font color="#4169E1">if</font> (!pc_gamg->orig_data && (<a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a>)(!pc_gamg->reuse_prol)) {
<a name="line642">642: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscMalloc1.html">PetscMalloc1</a>(pc_gamg->data_sz, &pc_gamg->orig_data));
<a name="line643">643: </a> <font color="#4169E1">for</font> (qq = 0; qq < pc_gamg->data_sz; qq++) pc_gamg->orig_data[qq] = pc_gamg->data[qq];
<a name="line644">644: </a> pc_gamg->orig_data_cell_rows = pc_gamg->data_cell_rows;
<a name="line645">645: </a> pc_gamg->orig_data_cell_cols = pc_gamg->data_cell_cols;
<a name="line646">646: </a> }
<a name="line648">648: </a> <font color="#B22222">/* get basic dims */</font>
<a name="line649">649: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetBlockSize.html">MatGetBlockSize</a>(Pmat, &bs));
<a name="line650">650: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetSize.html">MatGetSize</a>(Pmat, &M, NULL));
<a name="line652">652: </a><font color="#A020F0">#if defined(PETSC_USE_INFO)</font>
<a name="line653">653: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetInfo.html">MatGetInfo</a>(Pmat, <a href="../../../../../manualpages/Mat/MatInfoType.html">MAT_GLOBAL_SUM</a>, &info)); <font color="#B22222">/* global reduction */</font>
<a name="line654">654: </a> nnz0 = info.nz_used;
<a name="line655">655: </a> nnztot = info.nz_used;
<a name="line656">656: </a><font color="#A020F0">#endif</font>
<a name="line657">657: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: level %d) N=%"</font> PetscInt_FMT <font color="#666666">", n data rows=%"</font> PetscInt_FMT <font color="#666666">", n data cols=%"</font> PetscInt_FMT <font color="#666666">", nnz/row (ave)=%"</font> PetscInt_FMT <font color="#666666">", block size %"</font> PetscInt_FMT <font color="#666666">", np=%d\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, 0, M, pc_gamg->data_cell_rows,
<a name="line658">658: </a> pc_gamg->data_cell_cols, (<a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a>)(nnz0 / (<a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a>)M + 0.5), bs, size));
<a name="line660">660: </a> <font color="#B22222">/* Get A_i and R_i */</font>
<a name="line661">661: </a> <font color="#4169E1">for</font> (level = 0, Aarr[0] = Pmat, nactivepe = size; level < (pc_gamg->Nlevels - 1) && (level == 0 || M > pc_gamg->coarse_eq_limit); level++) {
<a name="line662">662: </a> pc_gamg->current_level = level;
<a name="line663">663: </a> level1 = level + 1;
<a name="line664">664: </a><font color="#A020F0">#if defined(GAMG_STAGES)</font>
<a name="line665">665: </a> <font color="#4169E1">if</font> (!gamg_stages[level]) {
<a name="line666">666: </a> char str[32];
<a name="line667">667: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscSNPrintf.html">PetscSNPrintf</a>(str, <a href="../../../../../manualpages/Sys/PETSC_STATIC_ARRAY_LENGTH.html">PETSC_STATIC_ARRAY_LENGTH</a>(str), <font color="#666666">"GAMG Level %"</font> PetscInt_FMT, level));
<a name="line668">668: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogStageRegister.html">PetscLogStageRegister</a>(str, &gamg_stages[level]));
<a name="line669">669: </a> }
<a name="line670">670: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogStagePush.html">PetscLogStagePush</a>(gamg_stages[level]));
<a name="line671">671: </a><font color="#A020F0">#endif</font>
<a name="line672">672: </a> <font color="#B22222">/* construct prolongator - Parr[level1] */</font>
<a name="line673">673: </a> <font color="#4169E1">if</font> (level == 0 && pc_gamg->injection_index_size > 0) {
<a name="line674">674: </a> <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> Prol;
<a name="line675">675: </a> <a href="../../../../../manualpages/Mat/MatType.html">MatType</a> mtype;
<a name="line676">676: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> prol_m, prol_n, Prol_N = (M / bs) * pc_gamg->injection_index_size, Istart, Iend, nn, row;
<a name="line677">677: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"Create fine grid injection space prolongation %"</font> PetscInt_FMT <font color="#666666">" x %"</font> PetscInt_FMT <font color="#666666">". %s\n"</font>, M, Prol_N, pc_gamg->data ? <font color="#666666">"delete null space data"</font> : <font color="#666666">""</font>));
<a name="line678">678: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetOwnershipRange.html">MatGetOwnershipRange</a>(Pmat, &Istart, &Iend));
<a name="line679">679: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetLocalSize.html">MatGetLocalSize</a>(Pmat, &prol_m, NULL)); <font color="#B22222">// rows m x n</font>
<a name="line680">680: </a> prol_n = (prol_m / bs) * pc_gamg->injection_index_size;
<a name="line681">681: </a> <a href="../../../../../manualpages/Sys/PetscCheck.html">PetscCheck</a>(pc_gamg->injection_index_size < bs, <a href="../../../../../manualpages/Sys/PetscObjectComm.html">PetscObjectComm</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc), <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_ERR_ARG_INCOMP</a>, <font color="#666666">"Injection size %"</font> PetscInt_FMT <font color="#666666">" must be less that block size %"</font> PetscInt_FMT, pc_gamg->injection_index_size, bs);
<a name="line682">682: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetType.html">MatGetType</a>(Pmat, &mtype));
<a name="line683">683: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatCreate.html">MatCreate</a>(<a href="../../../../../manualpages/Sys/PetscObjectComm.html">PetscObjectComm</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc), &Prol));
<a name="line684">684: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSetBlockSizes.html">MatSetBlockSizes</a>(Prol, bs, pc_gamg->injection_index_size));
<a name="line685">685: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSetSizes.html">MatSetSizes</a>(Prol, prol_m, prol_n, M, Prol_N));
<a name="line686">686: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSetType.html">MatSetType</a>(Prol, mtype));
<a name="line687">687: </a><font color="#A020F0">#if <a href="../../../../../manualpages/Sys/PetscDefined.html">PetscDefined</a>(HAVE_DEVICE)</font>
<a name="line688">688: </a> <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> flg;
<a name="line689">689: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatBoundToCPU.html">MatBoundToCPU</a>(Pmat, &flg));
<a name="line690">690: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatBindToCPU.html">MatBindToCPU</a>(Prol, flg));
<a name="line691">691: </a> <font color="#4169E1">if</font> (flg) <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSetBindingPropagates.html">MatSetBindingPropagates</a>(Prol, <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>));
<a name="line692">692: </a><font color="#A020F0">#endif</font>
<a name="line693">693: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSeqAIJSetPreallocation.html">MatSeqAIJSetPreallocation</a>(Prol, 1, NULL));
<a name="line694">694: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatMPIAIJSetPreallocation.html">MatMPIAIJSetPreallocation</a>(Prol, 1, NULL, 0, NULL));
<a name="line695">695: </a> <font color="#B22222">// set I \kron [1, 1, ... ]^T</font>
<a name="line696">696: </a> <font color="#4169E1">for</font> (<a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> ii = Istart, col = (Istart / bs) * pc_gamg->injection_index_size; ii < Iend; ii += bs) {
<a name="line697">697: </a> const <a href="../../../../../manualpages/Sys/PetscScalar.html">PetscScalar</a> one = 1;
<a name="line698">698: </a> <font color="#4169E1">for</font> (<a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> jj = 0; jj < pc_gamg->injection_index_size; jj++, col++) {
<a name="line699">699: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> row = ii + pc_gamg->injection_index[jj];
<a name="line700">700: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSetValues.html">MatSetValues</a>(Prol, 1, &row, 1, &col, &one, <a href="../../../../../manualpages/Sys/INSERT_VALUES.html">INSERT_VALUES</a>));
<a name="line701">701: </a> }
<a name="line702">702: </a> }
<a name="line703">703: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatAssemblyBegin.html">MatAssemblyBegin</a>(Prol, <a href="../../../../../manualpages/Mat/MatAssemblyType.html">MAT_FINAL_ASSEMBLY</a>));
<a name="line704">704: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatAssemblyEnd.html">MatAssemblyEnd</a>(Prol, <a href="../../../../../manualpages/Mat/MatAssemblyType.html">MAT_FINAL_ASSEMBLY</a>));
<a name="line705">705: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatViewFromOptions.html">MatViewFromOptions</a>(Prol, NULL, <font color="#666666">"-mat_view_injection"</font>));
<a name="line706">706: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetBlockSizes.html">MatGetBlockSizes</a>(Prol, NULL, &cr_bs)); <font color="#B22222">// column size</font>
<a name="line707">707: </a> Parr[level1] = Prol;
<a name="line708">708: </a> <font color="#B22222">// can not deal with null space -- with array of 'injection cols' we could take 'injection rows and 'injection cols' to 'data'</font>
<a name="line709">709: </a> <font color="#4169E1">if</font> (pc_gamg->data) {
<a name="line710">710: </a> pc_gamg->data_cell_cols = pc_gamg->injection_index_size;
<a name="line711">711: </a> pc_gamg->data_cell_rows = pc_gamg->injection_index_size;
<a name="line712">712: </a> pc_gamg->orig_data_cell_cols = 0;
<a name="line713">713: </a> pc_gamg->orig_data_cell_rows = 0;
<a name="line714">714: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFree.html">PetscFree</a>(pc_gamg->data));
<a name="line715">715: </a> pc_gamg->data_sz = pc_gamg->injection_index_size * prol_n;
<a name="line716">716: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscMalloc1.html">PetscMalloc1</a>(pc_gamg->data_sz, &pc_gamg->data));
<a name="line717">717: </a> <font color="#4169E1">for</font> (row = nn = 0; row < prol_n; row += pc_gamg->injection_index_size) {
<a name="line718">718: </a> <font color="#4169E1">for</font> (<a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> jj = 0; jj < pc_gamg->injection_index_size; jj++) {
<a name="line719">719: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> idx = row * pc_gamg->injection_index_size + jj * pc_gamg->injection_index_size;
<a name="line720">720: </a> <font color="#4169E1">for</font> (<a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> kk = 0; kk < pc_gamg->injection_index_size; kk++, nn++) { pc_gamg->data[idx + kk] = (jj == kk) ? 1 : 0; }
<a name="line721">721: </a> }
<a name="line722">722: </a> }
<a name="line723">723: </a> <a href="../../../../../manualpages/Sys/PetscCheck.html">PetscCheck</a>(nn == pc_gamg->data_sz, <a href="../../../../../manualpages/Sys/PETSC_COMM_SELF.html">PETSC_COMM_SELF</a>, <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_ERR_PLIB</a>, <font color="#666666">"nn != pc_gamg->data_sz %"</font> PetscInt_FMT <font color="#666666">" %"</font> PetscInt_FMT, pc_gamg->data_sz, nn);
<a name="line724">724: </a> }
<a name="line725">725: </a> } <font color="#4169E1">else</font> {
<a name="line726">726: </a> <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> Gmat, mat;
<a name="line727">727: </a> PetscCoarsenData *agg_lists;
<a name="line728">728: </a> <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> Prol11;
<a name="line730">730: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCGAMGCreateGraph.html">PCGAMGCreateGraph</a>(pc, Aarr[level], &Gmat));
<a name="line731">731: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(pc_gamg->ops->coarsen(pc, &Gmat, &agg_lists)); <font color="#B22222">// Gmat may have ghosts for QR aggregates not in matrix</font>
<a name="line732">732: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PetscCDGetMat(agg_lists, &mat));
<a name="line733">733: </a> <font color="#4169E1">if</font> (!mat) <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PetscCDSetMat(agg_lists, Gmat));
<a name="line734">734: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(pc_gamg->ops->prolongator(pc, Aarr[level], agg_lists, &Prol11));
<a name="line735">735: </a> <font color="#B22222">/* could have failed to create new level */</font>
<a name="line736">736: </a> <font color="#4169E1">if</font> (Prol11) {
<a name="line737">737: </a> const char *prefix;
<a name="line738">738: </a> char addp[32];
<a name="line740">740: </a> <font color="#B22222">/* get new block size of coarse matrices */</font>
<a name="line741">741: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetBlockSizes.html">MatGetBlockSizes</a>(Prol11, NULL, &cr_bs)); <font color="#B22222">// column size</font>
<a name="line743">743: </a> <font color="#4169E1">if</font> (pc_gamg->ops->optprolongator) {
<a name="line744">744: </a> <font color="#B22222">/* smooth */</font>
<a name="line745">745: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(pc_gamg->ops->optprolongator(pc, Aarr[level], &Prol11));
<a name="line746">746: </a> }
<a name="line748">748: </a> <font color="#4169E1">if</font> (pc_gamg->use_aggs_in_asm) {
<a name="line749">749: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> bs;
<a name="line750">750: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetBlockSizes.html">MatGetBlockSizes</a>(Prol11, &bs, NULL)); <font color="#B22222">// row block size</font>
<a name="line751">751: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PetscCDGetASMBlocks(agg_lists, bs, &nASMBlocksArr[level], &ASMLocalIDsArr[level]));
<a name="line752">752: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%"</font> PetscInt_FMT <font color="#666666">": %"</font> PetscInt_FMT <font color="#666666">" ASM local domains, bs = %"</font> PetscInt_FMT <font color="#666666">"\n"</font>, level, nASMBlocksArr[level], bs));
<a name="line753">753: </a> } <font color="#4169E1">else</font> <font color="#4169E1">if</font> (pc_gamg->asm_hem_aggs) {
<a name="line754">754: </a> const char *prefix;
<a name="line755">755: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> bs;
<a name="line757">757: </a> <font color="#B22222">/*</font>
<a name="line758">758: </a><font color="#B22222"> Do not use aggs created for defining coarser problems, instead create aggs specifically to use</font>
<a name="line759">759: </a><font color="#B22222"> to define <a href="../../../../../manualpages/PC/PCASM.html">PCASM</a> blocks.</font>
<a name="line760">760: </a><font color="#B22222"> */</font>
<a name="line761">761: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PetscCDGetMat(agg_lists, &mat));
<a name="line762">762: </a> <font color="#4169E1">if</font> (mat == Gmat) <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PetscCDClearMat(agg_lists)); <font color="#B22222">// take the <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> away from the list (yuck)</font>
<a name="line763">763: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PetscCDDestroy(agg_lists));
<a name="line764">764: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"HEM ASM passes = %"</font> PetscInt_FMT <font color="#666666">"\n"</font>, pc_gamg->asm_hem_aggs));
<a name="line765">765: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/MatGraphOperations/MatCoarsenDestroy.html">MatCoarsenDestroy</a>(&pc_gamg->asm_crs));
<a name="line766">766: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/MatGraphOperations/MatCoarsenCreate.html">MatCoarsenCreate</a>(<a href="../../../../../manualpages/Sys/PetscObjectComm.html">PetscObjectComm</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc), &pc_gamg->asm_crs));
<a name="line767">767: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectGetOptionsPrefix.html">PetscObjectGetOptionsPrefix</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, &prefix));
<a name="line768">768: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectSetOptionsPrefix.html">PetscObjectSetOptionsPrefix</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc_gamg->asm_crs, prefix));
<a name="line769">769: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/MatGraphOperations/MatCoarsenSetFromOptions.html">MatCoarsenSetFromOptions</a>(pc_gamg->asm_crs)); <font color="#B22222">// get strength args</font>
<a name="line770">770: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/MatGraphOperations/MatCoarsenSetType.html">MatCoarsenSetType</a>(pc_gamg->asm_crs, <a href="../../../../../manualpages/MatGraphOperations/MATCOARSENHEM.html">MATCOARSENHEM</a>));
<a name="line771">771: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/MatGraphOperations/MatCoarsenSetMaximumIterations.html">MatCoarsenSetMaximumIterations</a>(pc_gamg->asm_crs, pc_gamg->asm_hem_aggs));
<a name="line772">772: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/MatGraphOperations/MatCoarsenSetAdjacency.html">MatCoarsenSetAdjacency</a>(pc_gamg->asm_crs, Gmat));
<a name="line773">773: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/MatGraphOperations/MatCoarsenSetStrictAggs.html">MatCoarsenSetStrictAggs</a>(pc_gamg->asm_crs, <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>));
<a name="line774">774: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/MatGraphOperations/MatCoarsenApply.html">MatCoarsenApply</a>(pc_gamg->asm_crs));
<a name="line775">775: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/MatGraphOperations/MatCoarsenGetData.html">MatCoarsenGetData</a>(pc_gamg->asm_crs, &agg_lists)); <font color="#B22222">/* output */</font>
<a name="line776">776: </a> <font color="#B22222">// create aggregates</font>
<a name="line777">777: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetBlockSizes.html">MatGetBlockSizes</a>(Aarr[level], &bs, NULL)); <font color="#B22222">// row block size</font>
<a name="line778">778: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PetscCDGetASMBlocks(agg_lists, bs, &nASMBlocksArr[level], &ASMLocalIDsArr[level]));
<a name="line779">779: </a> }
<a name="line780">780: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCGetOptionsPrefix.html">PCGetOptionsPrefix</a>(pc, &prefix));
<a name="line781">781: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSetOptionsPrefix.html">MatSetOptionsPrefix</a>(Prol11, prefix));
<a name="line782">782: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscSNPrintf.html">PetscSNPrintf</a>(addp, <font color="#4169E1">sizeof</font>(addp), <font color="#666666">"pc_gamg_prolongator_%"</font> PetscInt_FMT <font color="#666666">"_"</font>, level));
<a name="line783">783: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatAppendOptionsPrefix.html">MatAppendOptionsPrefix</a>(Prol11, addp));
<a name="line784">784: </a> <font color="#B22222">/* Always generate the transpose with CUDA</font>
<a name="line785">785: </a><font color="#B22222"> Such behaviour can be adapted with -pc_gamg_prolongator_ prefixed options */</font>
<a name="line786">786: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSetOption.html">MatSetOption</a>(Prol11, <a href="../../../../../manualpages/Mat/MatOption.html">MAT_FORM_EXPLICIT_TRANSPOSE</a>, <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>));
<a name="line787">787: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatSetFromOptions.html">MatSetFromOptions</a>(Prol11));
<a name="line788">788: </a> Parr[level1] = Prol11;
<a name="line789">789: </a> } <font color="#4169E1">else</font> Parr[level1] = NULL; <font color="#B22222">/* failed to coarsen */</font>
<a name="line790">790: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PetscCDGetMat(agg_lists, &mat));
<a name="line791">791: </a> <font color="#4169E1">if</font> (mat == Gmat) <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PetscCDClearMat(agg_lists)); <font color="#B22222">// take the <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> away from the list (yuck)</font>
<a name="line792">792: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatDestroy.html">MatDestroy</a>(&Gmat));
<a name="line793">793: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PetscCDDestroy(agg_lists));
<a name="line794">794: </a> } <font color="#B22222">/* construct prolongator scope */</font>
<a name="line795">795: </a> <font color="#4169E1">if</font> (level == 0) Aarr[0] = Pmat; <font color="#B22222">/* use Pmat for finest level setup */</font>
<a name="line796">796: </a> <font color="#4169E1">if</font> (!Parr[level1]) { <font color="#B22222">/* failed to coarsen */</font>
<a name="line797">797: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: Stop gridding, level %"</font> PetscInt_FMT <font color="#666666">"\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, level));
<a name="line798">798: </a><font color="#A020F0">#if defined(GAMG_STAGES)</font>
<a name="line799">799: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogStagePop.html">PetscLogStagePop</a>());
<a name="line800">800: </a><font color="#A020F0">#endif</font>
<a name="line801">801: </a> <font color="#4169E1">break</font>;
<a name="line802">802: </a> }
<a name="line803">803: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetSize.html">MatGetSize</a>(Parr[level1], &M, &N)); <font color="#B22222">/* N is next M, a loop test variables */</font>
<a name="line804">804: </a> <a href="../../../../../manualpages/Sys/PetscCheck.html">PetscCheck</a>(!is_last, <a href="../../../../../manualpages/Sys/PETSC_COMM_SELF.html">PETSC_COMM_SELF</a>, <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_ERR_PLIB</a>, <font color="#666666">"Is last ?"</font>);
<a name="line805">805: </a> <font color="#4169E1">if</font> (N <= pc_gamg->coarse_eq_limit) is_last = <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>;
<a name="line806">806: </a> <font color="#4169E1">if</font> (level1 == pc_gamg->Nlevels - 1) is_last = <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>;
<a name="line807">807: </a> <font color="#4169E1">if</font> (level == PETSC_MG_MAXLEVELS - 2) is_last = <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>;
<a name="line808">808: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventBegin.html">PetscLogEventBegin</a>(petsc_gamg_setup_events[GAMG_LEVEL], 0, 0, 0, 0));
<a name="line809">809: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(pc_gamg->ops->createlevel(pc, Aarr[level], cr_bs, &Parr[level1], &Aarr[level1], &nactivepe, NULL, is_last));
<a name="line810">810: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventEnd.html">PetscLogEventEnd</a>(petsc_gamg_setup_events[GAMG_LEVEL], 0, 0, 0, 0));
<a name="line812">812: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetSize.html">MatGetSize</a>(Aarr[level1], &M, &N)); <font color="#B22222">/* M is loop test variables */</font>
<a name="line813">813: </a><font color="#A020F0">#if defined(PETSC_USE_INFO)</font>
<a name="line814">814: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetInfo.html">MatGetInfo</a>(Aarr[level1], <a href="../../../../../manualpages/Mat/MatInfoType.html">MAT_GLOBAL_SUM</a>, &info));
<a name="line815">815: </a> nnztot += info.nz_used;
<a name="line816">816: </a><font color="#A020F0">#endif</font>
<a name="line817">817: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: %"</font> PetscInt_FMT <font color="#666666">") N=%"</font> PetscInt_FMT <font color="#666666">", n data cols=%"</font> PetscInt_FMT <font color="#666666">", nnz/row (ave)=%"</font> PetscInt_FMT <font color="#666666">", %d active pes\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, level1, M, pc_gamg->data_cell_cols, (<a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a>)(info.nz_used / (<a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a>)M), nactivepe));
<a name="line819">819: </a><font color="#A020F0">#if defined(GAMG_STAGES)</font>
<a name="line820">820: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogStagePop.html">PetscLogStagePop</a>());
<a name="line821">821: </a><font color="#A020F0">#endif</font>
<a name="line822">822: </a> <font color="#B22222">/* stop if one node or one proc -- could pull back for singular problems */</font>
<a name="line823">823: </a> <font color="#4169E1">if</font> ((pc_gamg->data_cell_cols && M / pc_gamg->data_cell_cols < 2) || (!pc_gamg->data_cell_cols && M / bs < 2)) {
<a name="line824">824: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: HARD stop of coarsening on level %"</font> PetscInt_FMT <font color="#666666">". Grid too small: %"</font> PetscInt_FMT <font color="#666666">" block nodes\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, level, M / bs));
<a name="line825">825: </a> level++;
<a name="line826">826: </a> <font color="#4169E1">break</font>;
<a name="line827">827: </a> } <font color="#4169E1">else</font> <font color="#4169E1">if</font> (level == PETSC_MG_MAXLEVELS - 2) { <font color="#B22222">/* stop if we are limited by PC_MG_MAXLEVELS */</font>
<a name="line828">828: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: HARD stop of coarsening on level %"</font> PetscInt_FMT <font color="#666666">". PC_MG_MAXLEVELS reached\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, level));
<a name="line829">829: </a> level++;
<a name="line830">830: </a> <font color="#4169E1">break</font>;
<a name="line831">831: </a> }
<a name="line832">832: </a> } <font color="#B22222">/* levels */</font>
<a name="line833">833: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFree.html">PetscFree</a>(pc_gamg->data));
<a name="line835">835: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: %"</font> PetscInt_FMT <font color="#666666">" levels, operator complexity = %g\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, level + 1, nnztot / nnz0));
<a name="line836">836: </a> pc_gamg->Nlevels = level + 1;
<a name="line837">837: </a> fine_level = level;
<a name="line838">838: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCMGSetLevels.html">PCMGSetLevels</a>(pc, pc_gamg->Nlevels, NULL));
<a name="line840">840: </a> <font color="#4169E1">if</font> (pc_gamg->Nlevels > 1) { <font color="#B22222">/* don't setup MG if one level */</font>
<a name="line842">842: </a> <font color="#B22222">/* set default smoothers & set operators */</font>
<a name="line843">843: </a> <font color="#4169E1">for</font> (lidx = 1, level = pc_gamg->Nlevels - 2; lidx <= fine_level; lidx++, level--) {
<a name="line844">844: </a> <a href="../../../../../manualpages/KSP/KSP.html">KSP</a> smoother;
<a name="line845">845: </a> <a href="../../../../../manualpages/PC/PC.html">PC</a> subpc;
<a name="line847">847: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCMGGetSmoother.html">PCMGGetSmoother</a>(pc, lidx, &smoother));
<a name="line848">848: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/KSP/KSPGetPC.html">KSPGetPC</a>(smoother, &subpc));
<a name="line850">850: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/KSP/KSPSetNormType.html">KSPSetNormType</a>(smoother, <a href="../../../../../manualpages/KSP/KSP_NORM_NONE.html">KSP_NORM_NONE</a>));
<a name="line851">851: </a> <font color="#B22222">/* set ops */</font>
<a name="line852">852: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/KSP/KSPSetOperators.html">KSPSetOperators</a>(smoother, Aarr[level], Aarr[level]));
<a name="line853">853: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCMGSetInterpolation.html">PCMGSetInterpolation</a>(pc, lidx, Parr[level + 1]));
<a name="line855">855: </a> <font color="#B22222">/* set defaults */</font>
<a name="line856">856: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/KSP/KSPSetType.html">KSPSetType</a>(smoother, <a href="../../../../../manualpages/KSP/KSPCHEBYSHEV.html">KSPCHEBYSHEV</a>));
<a name="line858">858: </a> <font color="#B22222">/* set blocks for ASM smoother that uses the 'aggregates' */</font>
<a name="line859">859: </a> <font color="#4169E1">if</font> (pc_gamg->use_aggs_in_asm || pc_gamg->asm_hem_aggs) {
<a name="line860">860: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> sz;
<a name="line861">861: </a> <a href="../../../../../manualpages/IS/IS.html">IS</a> *iss;
<a name="line863">863: </a> sz = nASMBlocksArr[level];
<a name="line864">864: </a> iss = ASMLocalIDsArr[level];
<a name="line865">865: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCSetType.html">PCSetType</a>(subpc, <a href="../../../../../manualpages/PC/PCASM.html">PCASM</a>));
<a name="line866">866: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCASMSetOverlap.html">PCASMSetOverlap</a>(subpc, 0));
<a name="line867">867: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCASMSetType.html">PCASMSetType</a>(subpc, <a href="../../../../../manualpages/PC/PCASMType.html">PC_ASM_BASIC</a>));
<a name="line868">868: </a> <font color="#4169E1">if</font> (!sz) {
<a name="line869">869: </a> <a href="../../../../../manualpages/IS/IS.html">IS</a> is;
<a name="line870">870: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISCreateGeneral.html">ISCreateGeneral</a>(<a href="../../../../../manualpages/Sys/PETSC_COMM_SELF.html">PETSC_COMM_SELF</a>, 0, NULL, <a href="../../../../../manualpages/Sys/PetscCopyMode.html">PETSC_COPY_VALUES</a>, &is));
<a name="line871">871: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCASMSetLocalSubdomains.html">PCASMSetLocalSubdomains</a>(subpc, 1, NULL, &is));
<a name="line872">872: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISDestroy.html">ISDestroy</a>(&is));
<a name="line873">873: </a> } <font color="#4169E1">else</font> {
<a name="line874">874: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> kk;
<a name="line875">875: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCASMSetLocalSubdomains.html">PCASMSetLocalSubdomains</a>(subpc, sz, iss, NULL));
<a name="line876">876: </a> <font color="#4169E1">for</font> (kk = 0; kk < sz; kk++) <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/IS/ISDestroy.html">ISDestroy</a>(&iss[kk]));
<a name="line877">877: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFree.html">PetscFree</a>(iss));
<a name="line878">878: </a> }
<a name="line879">879: </a> ASMLocalIDsArr[level] = NULL;
<a name="line880">880: </a> nASMBlocksArr[level] = 0;
<a name="line881">881: </a> } <font color="#4169E1">else</font> {
<a name="line882">882: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCSetType.html">PCSetType</a>(subpc, <a href="../../../../../manualpages/PC/PCJACOBI.html">PCJACOBI</a>));
<a name="line883">883: </a> }
<a name="line884">884: </a> }
<a name="line885">885: </a> {
<a name="line886">886: </a> <font color="#B22222">/* coarse grid */</font>
<a name="line887">887: </a> <a href="../../../../../manualpages/KSP/KSP.html">KSP</a> smoother, *k2;
<a name="line888">888: </a> <a href="../../../../../manualpages/PC/PC.html">PC</a> subpc, pc2;
<a name="line889">889: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> ii, first;
<a name="line890">890: </a> <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> Lmat = Aarr[pc_gamg->Nlevels - 1];
<a name="line891">891: </a> lidx = 0;
<a name="line893">893: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCMGGetSmoother.html">PCMGGetSmoother</a>(pc, lidx, &smoother));
<a name="line894">894: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/KSP/KSPSetOperators.html">KSPSetOperators</a>(smoother, Lmat, Lmat));
<a name="line895">895: </a> <font color="#4169E1">if</font> (!pc_gamg->use_parallel_coarse_grid_solver) {
<a name="line896">896: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/KSP/KSPSetNormType.html">KSPSetNormType</a>(smoother, <a href="../../../../../manualpages/KSP/KSP_NORM_NONE.html">KSP_NORM_NONE</a>));
<a name="line897">897: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/KSP/KSPGetPC.html">KSPGetPC</a>(smoother, &subpc));
<a name="line898">898: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCSetType.html">PCSetType</a>(subpc, <a href="../../../../../manualpages/PC/PCBJACOBI.html">PCBJACOBI</a>));
<a name="line899">899: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCSetUp.html">PCSetUp</a>(subpc));
<a name="line900">900: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCBJacobiGetSubKSP.html">PCBJacobiGetSubKSP</a>(subpc, &ii, &first, &k2));
<a name="line901">901: </a> <a href="../../../../../manualpages/Sys/PetscCheck.html">PetscCheck</a>(ii == 1, <a href="../../../../../manualpages/Sys/PETSC_COMM_SELF.html">PETSC_COMM_SELF</a>, <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_ERR_PLIB</a>, <font color="#666666">"ii %"</font> PetscInt_FMT <font color="#666666">" is not one"</font>, ii);
<a name="line902">902: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/KSP/KSPGetPC.html">KSPGetPC</a>(k2[0], &pc2));
<a name="line903">903: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCSetType.html">PCSetType</a>(pc2, <a href="../../../../../manualpages/PC/PCLU.html">PCLU</a>));
<a name="line904">904: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCFactorSetShiftType.html">PCFactorSetShiftType</a>(pc2, MAT_SHIFT_INBLOCKS));
<a name="line905">905: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/KSP/KSPSetTolerances.html">KSPSetTolerances</a>(k2[0], <a href="../../../../../manualpages/Sys/PETSC_CURRENT.html">PETSC_CURRENT</a>, <a href="../../../../../manualpages/Sys/PETSC_CURRENT.html">PETSC_CURRENT</a>, <a href="../../../../../manualpages/Sys/PETSC_CURRENT.html">PETSC_CURRENT</a>, 1));
<a name="line906">906: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/KSP/KSPSetType.html">KSPSetType</a>(k2[0], <a href="../../../../../manualpages/KSP/KSPPREONLY.html">KSPPREONLY</a>));
<a name="line907">907: </a> }
<a name="line908">908: </a> }
<a name="line910">910: </a> <font color="#B22222">/* should be called in PCSetFromOptions_GAMG(), but cannot be called prior to <a href="../../../../../manualpages/PC/PCMGSetLevels.html">PCMGSetLevels</a>() */</font>
<a name="line911">911: </a> <a href="../../../../../manualpages/Sys/PetscObjectOptionsBegin.html">PetscObjectOptionsBegin</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc);
<a name="line912">912: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PCSetFromOptions_MG(pc, PetscOptionsObject));
<a name="line913">913: </a> <a href="../../../../../manualpages/Sys/PetscOptionsEnd.html">PetscOptionsEnd</a>();
<a name="line914">914: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCMGSetGalerkin.html">PCMGSetGalerkin</a>(pc, <a href="../../../../../manualpages/PC/PCMGalerkinType.html">PC_MG_GALERKIN_EXTERNAL</a>));
<a name="line916">916: </a> <font color="#B22222">/* set cheby eigen estimates from SA to use in the solver */</font>
<a name="line917">917: </a> <font color="#4169E1">if</font> (pc_gamg->use_sa_esteig) {
<a name="line918">918: </a> <font color="#4169E1">for</font> (lidx = 1, level = pc_gamg->Nlevels - 2; level >= 0; lidx++, level--) {
<a name="line919">919: </a> <a href="../../../../../manualpages/KSP/KSP.html">KSP</a> smoother;
<a name="line920">920: </a> <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> ischeb;
<a name="line922">922: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCMGGetSmoother.html">PCMGGetSmoother</a>(pc, lidx, &smoother));
<a name="line923">923: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectTypeCompare.html">PetscObjectTypeCompare</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)smoother, <a href="../../../../../manualpages/KSP/KSPCHEBYSHEV.html">KSPCHEBYSHEV</a>, &ischeb));
<a name="line924">924: </a> <font color="#4169E1">if</font> (ischeb) {
<a name="line925">925: </a> KSP_Chebyshev *cheb = (KSP_Chebyshev *)smoother->data;
<a name="line927">927: </a> <font color="#B22222">// The command line will override these settings because <a href="../../../../../manualpages/KSP/KSPSetFromOptions.html">KSPSetFromOptions</a> is called in PCSetUp_MG</font>
<a name="line928">928: </a> <font color="#4169E1">if</font> (mg->max_eigen_DinvA[level] > 0) {
<a name="line929">929: </a> <font color="#B22222">// SA uses Jacobi for P; we use SA estimates if the smoother is also Jacobi or if the user explicitly requested it.</font>
<a name="line930">930: </a> <font color="#B22222">// TODO: This should test whether it's the same Jacobi variant (DIAG, ROWSUM, etc.)</font>
<a name="line931">931: </a> <a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a> emax, emin;
<a name="line933">933: </a> emin = mg->min_eigen_DinvA[level];
<a name="line934">934: </a> emax = mg->max_eigen_DinvA[level];
<a name="line935">935: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: PCSetUp_GAMG: call <a href="../../../../../manualpages/KSP/KSPChebyshevSetEigenvalues.html">KSPChebyshevSetEigenvalues</a> on level %"</font> PetscInt_FMT <font color="#666666">" (N=%"</font> PetscInt_FMT <font color="#666666">") with emax = %g emin = %g\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix, level, Aarr[level]->rmap->N, (double)emax, (double)emin));
<a name="line936">936: </a> cheb->emin_provided = emin;
<a name="line937">937: </a> cheb->emax_provided = emax;
<a name="line938">938: </a> }
<a name="line939">939: </a> }
<a name="line940">940: </a> }
<a name="line941">941: </a> }
<a name="line943">943: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PCSetUp_MG(pc));
<a name="line945">945: </a> <font color="#B22222">/* clean up */</font>
<a name="line946">946: </a> <font color="#4169E1">for</font> (level = 1; level < pc_gamg->Nlevels; level++) {
<a name="line947">947: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatDestroy.html">MatDestroy</a>(&Parr[level]));
<a name="line948">948: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatDestroy.html">MatDestroy</a>(&Aarr[level]));
<a name="line949">949: </a> }
<a name="line950">950: </a> } <font color="#4169E1">else</font> {
<a name="line951">951: </a> <a href="../../../../../manualpages/KSP/KSP.html">KSP</a> smoother;
<a name="line953">953: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscInfo.html">PetscInfo</a>(pc, <font color="#666666">"%s: One level solver used (system is seen as DD). Using default solver.\n"</font>, ((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)->prefix));
<a name="line954">954: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCMGGetSmoother.html">PCMGGetSmoother</a>(pc, 0, &smoother));
<a name="line955">955: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/KSP/KSPSetOperators.html">KSPSetOperators</a>(smoother, Aarr[0], Aarr[0]));
<a name="line956">956: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/KSP/KSPSetType.html">KSPSetType</a>(smoother, <a href="../../../../../manualpages/KSP/KSPPREONLY.html">KSPPREONLY</a>));
<a name="line957">957: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PCSetUp_MG(pc));
<a name="line958">958: </a> }
<a name="line959">959: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventEnd.html">PetscLogEventEnd</a>(petsc_gamg_setup_events[GAMG_SETUP], 0, 0, 0, 0));
<a name="line960">960: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line961">961: </a>}
<a name="line963">963: </a><font color="#B22222">/*</font>
<a name="line964">964: </a><font color="#B22222"> PCDestroy_GAMG - Destroys the private context for the GAMG preconditioner</font>
<a name="line965">965: </a><font color="#B22222"> that was created with PCCreate_GAMG().</font>
<a name="line967">967: </a><font color="#B22222"> Input Parameter:</font>
<a name="line968">968: </a><font color="#B22222">. pc - the preconditioner context</font>
<a name="line970">970: </a><font color="#B22222"> Application Interface Routine: <a href="../../../../../manualpages/PC/PCDestroy.html">PCDestroy</a>()</font>
<a name="line971">971: </a><font color="#B22222">*/</font>
<a name="line972">972: </a><strong><font color="#4169E1"><a name="PCDestroy_GAMG"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCDestroy_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc)</font></strong>
<a name="line973">973: </a>{
<a name="line974">974: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line975">975: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line977">977: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line978">978: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PCReset_GAMG(pc));
<a name="line979">979: </a> <font color="#4169E1">if</font> (pc_gamg->ops->destroy) <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>((*pc_gamg->ops->destroy)(pc));
<a name="line980">980: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFree.html">PetscFree</a>(pc_gamg->ops));
<a name="line981">981: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFree.html">PetscFree</a>(pc_gamg->gamg_type_name));
<a name="line982">982: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFree.html">PetscFree</a>(pc_gamg));
<a name="line983">983: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetProcEqLim_C"</font>, NULL));
<a name="line984">984: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetCoarseEqLim_C"</font>, NULL));
<a name="line985">985: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetRepartition_C"</font>, NULL));
<a name="line986">986: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetEigenvalues_C"</font>, NULL));
<a name="line987">987: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetUseSAEstEig_C"</font>, NULL));
<a name="line988">988: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetRecomputeEstEig_C"</font>, NULL));
<a name="line989">989: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetReuseInterpolation_C"</font>, NULL));
<a name="line990">990: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGASMSetUseAggs_C"</font>, NULL));
<a name="line991">991: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetParallelCoarseGridSolve_C"</font>, NULL));
<a name="line992">992: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetCpuPinCoarseGrids_C"</font>, NULL));
<a name="line993">993: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetCoarseGridLayoutType_C"</font>, NULL));
<a name="line994">994: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetThreshold_C"</font>, NULL));
<a name="line995">995: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetRankReductionFactors_C"</font>, NULL));
<a name="line996">996: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetThresholdScale_C"</font>, NULL));
<a name="line997">997: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetType_C"</font>, NULL));
<a name="line998">998: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGGetType_C"</font>, NULL));
<a name="line999">999: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetNlevels_C"</font>, NULL));
<a name="line1000">1000: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGASMSetHEM_C"</font>, NULL));
<a name="line1001">1001: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetInjectionIndices_C"</font>, NULL));
<a name="line1002">1002: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetInjectionIndex_C"</font>, NULL));
<a name="line1003">1003: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PCDestroy_MG(pc));
<a name="line1004">1004: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1005">1005: </a>}
<a name="line1007">1007: </a><font color="#B22222">/*@</font>
<a name="line1008">1008: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGSetProcEqLim.html">PCGAMGSetProcEqLim</a> - Set number of equations to aim for per process on the coarse grids via processor reduction in `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`</font>
<a name="line1010">1010: </a><font color="#B22222"> Logically Collective</font>
<a name="line1012">1012: </a><font color="#B22222"> Input Parameters:</font>
<a name="line1013">1013: </a><font color="#B22222">+ pc - the preconditioner context</font>
<a name="line1014">1014: </a><font color="#B22222">- n - the number of equations</font>
<a name="line1016">1016: </a><font color="#B22222"> Options Database Key:</font>
<a name="line1017">1017: </a><font color="#B22222">. -pc_gamg_process_eq_limit <limit> - set the limit</font>
<a name="line1019">1019: </a><font color="#B22222"> Level: intermediate</font>
<a name="line1021">1021: </a><font color="#B22222"> Note:</font>
<a name="line1022">1022: </a><font color="#B22222"> `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>` will reduce the number of MPI processes used directly on the coarse grids so that there are around <limit> equations on each process</font>
<a name="line1023">1023: </a><font color="#B22222"> that has degrees of freedom</font>
<a name="line1025">1025: </a><font color="#B22222"> Developer Note:</font>
<a name="line1026">1026: </a><font color="#B22222"> Should be named `PCGAMGSetProcessEquationLimit()`.</font>
<a name="line1028">1028: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`, `<a href="../../../../../manualpages/PC/PCGAMGSetCoarseEqLim.html">PCGAMGSetCoarseEqLim</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGSetRankReductionFactors.html">PCGAMGSetRankReductionFactors</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGSetRepartition.html">PCGAMGSetRepartition</a>()`</font>
<a name="line1029">1029: </a><font color="#B22222">@*/</font>
<a name="line1030">1030: </a><strong><font color="#4169E1"><a name="PCGAMGSetProcEqLim"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGSetProcEqLim.html">PCGAMGSetProcEqLim</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> n)</font></strong>
<a name="line1031">1031: </a>{
<a name="line1032">1032: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1034">1034: </a> <a href="../../../../../manualpages/Sys/PetscTryMethod.html">PetscTryMethod</a>(pc, <font color="#666666">"PCGAMGSetProcEqLim_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a>), (pc, n));
<a name="line1035">1035: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1036">1036: </a>}
<a name="line1038">1038: </a><strong><font color="#4169E1"><a name="PCGAMGSetProcEqLim_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGSetProcEqLim_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> n)</font></strong>
<a name="line1039">1039: </a>{
<a name="line1040">1040: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1041">1041: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1043">1043: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1044">1044: </a> <font color="#4169E1">if</font> (n > 0) pc_gamg->min_eq_proc = n;
<a name="line1045">1045: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1046">1046: </a>}
<a name="line1048">1048: </a><font color="#B22222">/*@</font>
<a name="line1049">1049: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGSetCoarseEqLim.html">PCGAMGSetCoarseEqLim</a> - Set maximum number of equations on the coarsest grid of `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`</font>
<a name="line1051">1051: </a><font color="#B22222"> Collective</font>
<a name="line1053">1053: </a><font color="#B22222"> Input Parameters:</font>
<a name="line1054">1054: </a><font color="#B22222">+ pc - the preconditioner context</font>
<a name="line1055">1055: </a><font color="#B22222">- n - maximum number of equations to aim for</font>
<a name="line1057">1057: </a><font color="#B22222"> Options Database Key:</font>
<a name="line1058">1058: </a><font color="#B22222">. -pc_gamg_coarse_eq_limit <limit> - set the limit</font>
<a name="line1060">1060: </a><font color="#B22222"> Level: intermediate</font>
<a name="line1062">1062: </a><font color="#B22222"> Note:</font>
<a name="line1063">1063: </a><font color="#B22222"> For example -pc_gamg_coarse_eq_limit 1000 will stop coarsening once the coarse grid</font>
<a name="line1064">1064: </a><font color="#B22222"> has less than 1000 unknowns.</font>
<a name="line1066">1066: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`, `<a href="../../../../../manualpages/PC/PCGAMGSetProcEqLim.html">PCGAMGSetProcEqLim</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGSetRankReductionFactors.html">PCGAMGSetRankReductionFactors</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGSetRepartition.html">PCGAMGSetRepartition</a>()`,</font>
<a name="line1067">1067: </a><font color="#B22222"> `<a href="../../../../../manualpages/PC/PCGAMGSetParallelCoarseGridSolve.html">PCGAMGSetParallelCoarseGridSolve</a>()`</font>
<a name="line1068">1068: </a><font color="#B22222">@*/</font>
<a name="line1069">1069: </a><strong><font color="#4169E1"><a name="PCGAMGSetCoarseEqLim"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGSetCoarseEqLim.html">PCGAMGSetCoarseEqLim</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> n)</font></strong>
<a name="line1070">1070: </a>{
<a name="line1071">1071: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1073">1073: </a> <a href="../../../../../manualpages/Sys/PetscTryMethod.html">PetscTryMethod</a>(pc, <font color="#666666">"PCGAMGSetCoarseEqLim_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a>), (pc, n));
<a name="line1074">1074: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1075">1075: </a>}
<a name="line1077">1077: </a><strong><font color="#4169E1"><a name="PCGAMGSetCoarseEqLim_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGSetCoarseEqLim_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> n)</font></strong>
<a name="line1078">1078: </a>{
<a name="line1079">1079: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1080">1080: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1082">1082: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1083">1083: </a> <font color="#4169E1">if</font> (n > 0) pc_gamg->coarse_eq_limit = n;
<a name="line1084">1084: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1085">1085: </a>}
<a name="line1087">1087: </a><font color="#B22222">/*@</font>
<a name="line1088">1088: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGSetRepartition.html">PCGAMGSetRepartition</a> - Repartition the degrees of freedom across the processors on the coarser grids when reducing the number of MPI ranks to use</font>
<a name="line1090">1090: </a><font color="#B22222"> Collective</font>
<a name="line1092">1092: </a><font color="#B22222"> Input Parameters:</font>
<a name="line1093">1093: </a><font color="#B22222">+ pc - the preconditioner context</font>
<a name="line1094">1094: </a><font color="#B22222">- n - `<a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>` or `<a href="../../../../../manualpages/Sys/PETSC_FALSE.html">PETSC_FALSE</a>`</font>
<a name="line1096">1096: </a><font color="#B22222"> Options Database Key:</font>
<a name="line1097">1097: </a><font color="#B22222">. -pc_gamg_repartition <true,false> - turn on the repartitioning</font>
<a name="line1099">1099: </a><font color="#B22222"> Level: intermediate</font>
<a name="line1101">1101: </a><font color="#B22222"> Note:</font>
<a name="line1102">1102: </a><font color="#B22222"> This will generally improve the loading balancing of the work on each level so the solves will be faster but it adds to the</font>
<a name="line1103">1103: </a><font color="#B22222"> preconditioner setup time.</font>
<a name="line1105">1105: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`, `<a href="../../../../../manualpages/PC/PCGAMGSetProcEqLim.html">PCGAMGSetProcEqLim</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGSetRankReductionFactors.html">PCGAMGSetRankReductionFactors</a>()`</font>
<a name="line1106">1106: </a><font color="#B22222">@*/</font>
<a name="line1107">1107: </a><strong><font color="#4169E1"><a name="PCGAMGSetRepartition"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGSetRepartition.html">PCGAMGSetRepartition</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> n)</font></strong>
<a name="line1108">1108: </a>{
<a name="line1109">1109: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1111">1111: </a> <a href="../../../../../manualpages/Sys/PetscTryMethod.html">PetscTryMethod</a>(pc, <font color="#666666">"PCGAMGSetRepartition_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a>), (pc, n));
<a name="line1112">1112: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1113">1113: </a>}
<a name="line1115">1115: </a><strong><font color="#4169E1"><a name="PCGAMGSetRepartition_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGSetRepartition_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> n)</font></strong>
<a name="line1116">1116: </a>{
<a name="line1117">1117: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1118">1118: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1120">1120: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1121">1121: </a> pc_gamg->repart = n;
<a name="line1122">1122: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1123">1123: </a>}
<a name="line1125">1125: </a><font color="#B22222">/*@</font>
<a name="line1126">1126: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGSetUseSAEstEig.html">PCGAMGSetUseSAEstEig</a> - Use the eigen estimate from smoothed aggregation for the Chebyshev smoother during the solution process</font>
<a name="line1128">1128: </a><font color="#B22222"> Collective</font>
<a name="line1130">1130: </a><font color="#B22222"> Input Parameters:</font>
<a name="line1131">1131: </a><font color="#B22222">+ pc - the preconditioner context</font>
<a name="line1132">1132: </a><font color="#B22222">- b - flag</font>
<a name="line1134">1134: </a><font color="#B22222"> Options Database Key:</font>
<a name="line1135">1135: </a><font color="#B22222">. -pc_gamg_use_sa_esteig <true,false> - use the eigen estimate</font>
<a name="line1137">1137: </a><font color="#B22222"> Level: advanced</font>
<a name="line1139">1139: </a><font color="#B22222"> Notes:</font>
<a name="line1140">1140: </a><font color="#B22222"> Smoothed aggregation constructs the smoothed prolongator $P = (I - \omega D^{-1} A) T$ where $T$ is the tentative prolongator and $D$ is the diagonal of $A$.</font>
<a name="line1141">1141: </a><font color="#B22222"> Eigenvalue estimates (based on a few `PCCG` or `PCGMRES` iterations) are computed to choose $\omega$ so that this is a stable smoothing operation.</font>
<a name="line1142">1142: </a><font color="#B22222"> If `<a href="../../../../../manualpages/KSP/KSPCHEBYSHEV.html">KSPCHEBYSHEV</a>` with `<a href="../../../../../manualpages/PC/PCJACOBI.html">PCJACOBI</a>` (diagonal) preconditioning is used for smoothing on the finest level, then the eigenvalue estimates</font>
<a name="line1143">1143: </a><font color="#B22222"> can be reused during the solution process.</font>
<a name="line1144">1144: </a><font color="#B22222"> This option is only used when the smoother uses `<a href="../../../../../manualpages/PC/PCJACOBI.html">PCJACOBI</a>`, and should be turned off when a different `<a href="../../../../../manualpages/PC/PCJacobiType.html">PCJacobiType</a>` is used.</font>
<a name="line1145">1145: </a><font color="#B22222"> It became default in PETSc 3.17.</font>
<a name="line1147">1147: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`, `<a href="../../../../../manualpages/KSP/KSPChebyshevSetEigenvalues.html">KSPChebyshevSetEigenvalues</a>()`, `<a href="../../../../../manualpages/KSP/KSPChebyshevEstEigSet.html">KSPChebyshevEstEigSet</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGSetRecomputeEstEig.html">PCGAMGSetRecomputeEstEig</a>()`</font>
<a name="line1148">1148: </a><font color="#B22222">@*/</font>
<a name="line1149">1149: </a><strong><font color="#4169E1"><a name="PCGAMGSetUseSAEstEig"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGSetUseSAEstEig.html">PCGAMGSetUseSAEstEig</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> b)</font></strong>
<a name="line1150">1150: </a>{
<a name="line1151">1151: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1153">1153: </a> <a href="../../../../../manualpages/Sys/PetscTryMethod.html">PetscTryMethod</a>(pc, <font color="#666666">"PCGAMGSetUseSAEstEig_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a>), (pc, b));
<a name="line1154">1154: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1155">1155: </a>}
<a name="line1157">1157: </a><strong><font color="#4169E1"><a name="PCGAMGSetUseSAEstEig_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGSetUseSAEstEig_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> b)</font></strong>
<a name="line1158">1158: </a>{
<a name="line1159">1159: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1160">1160: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1162">1162: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1163">1163: </a> pc_gamg->use_sa_esteig = b;
<a name="line1164">1164: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1165">1165: </a>}
<a name="line1167">1167: </a><font color="#B22222">/*@</font>
<a name="line1168">1168: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGSetRecomputeEstEig.html">PCGAMGSetRecomputeEstEig</a> - Set flag for Chebyshev smoothers to recompute the eigen estimates when a new matrix is used</font>
<a name="line1170">1170: </a><font color="#B22222"> Collective</font>
<a name="line1172">1172: </a><font color="#B22222"> Input Parameters:</font>
<a name="line1173">1173: </a><font color="#B22222">+ pc - the preconditioner context</font>
<a name="line1174">1174: </a><font color="#B22222">- b - flag, default is `<a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>`</font>
<a name="line1176">1176: </a><font color="#B22222"> Options Database Key:</font>
<a name="line1177">1177: </a><font color="#B22222">. -pc_gamg_recompute_esteig <true> - use the eigen estimate</font>
<a name="line1179">1179: </a><font color="#B22222"> Level: advanced</font>
<a name="line1181">1181: </a><font color="#B22222"> Note:</font>
<a name="line1182">1182: </a><font color="#B22222"> If the matrix changes only slightly in a new solve using ``<a href="../../../../../manualpages/Sys/PETSC_FALSE.html">PETSC_FALSE</a>`` will save time in the setting up of the preconditioner</font>
<a name="line1183">1183: </a><font color="#B22222"> and may not affect the solution time much.</font>
<a name="line1185">1185: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`, `<a href="../../../../../manualpages/KSP/KSPChebyshevSetEigenvalues.html">KSPChebyshevSetEigenvalues</a>()`, `<a href="../../../../../manualpages/KSP/KSPChebyshevEstEigSet.html">KSPChebyshevEstEigSet</a>()`</font>
<a name="line1186">1186: </a><font color="#B22222">@*/</font>
<a name="line1187">1187: </a><strong><font color="#4169E1"><a name="PCGAMGSetRecomputeEstEig"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGSetRecomputeEstEig.html">PCGAMGSetRecomputeEstEig</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> b)</font></strong>
<a name="line1188">1188: </a>{
<a name="line1189">1189: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1191">1191: </a> <a href="../../../../../manualpages/Sys/PetscTryMethod.html">PetscTryMethod</a>(pc, <font color="#666666">"PCGAMGSetRecomputeEstEig_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a>), (pc, b));
<a name="line1192">1192: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1193">1193: </a>}
<a name="line1195">1195: </a><strong><font color="#4169E1"><a name="PCGAMGSetRecomputeEstEig_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGSetRecomputeEstEig_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> b)</font></strong>
<a name="line1196">1196: </a>{
<a name="line1197">1197: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1198">1198: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1200">1200: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1201">1201: </a> pc_gamg->recompute_esteig = b;
<a name="line1202">1202: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1203">1203: </a>}
<a name="line1205">1205: </a><font color="#B22222">/*@</font>
<a name="line1206">1206: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGSetEigenvalues.html">PCGAMGSetEigenvalues</a> - Set WHAT eigenvalues WHY?</font>
<a name="line1208">1208: </a><font color="#B22222"> Collective</font>
<a name="line1210">1210: </a><font color="#B22222"> Input Parameters:</font>
<a name="line1211">1211: </a><font color="#B22222">+ pc - the preconditioner context</font>
<a name="line1212">1212: </a><font color="#B22222">. emax - max eigenvalue</font>
<a name="line1213">1213: </a><font color="#B22222">- emin - min eigenvalue</font>
<a name="line1215">1215: </a><font color="#B22222"> Options Database Key:</font>
<a name="line1216">1216: </a><font color="#B22222">. -pc_gamg_eigenvalues <emin,emax> - estimates of the eigenvalues</font>
<a name="line1218">1218: </a><font color="#B22222"> Level: intermediate</font>
<a name="line1220">1220: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`, `<a href="../../../../../manualpages/PC/PCGAMGSetUseSAEstEig.html">PCGAMGSetUseSAEstEig</a>()`</font>
<a name="line1221">1221: </a><font color="#B22222">@*/</font>
<a name="line1222">1222: </a><strong><font color="#4169E1"><a name="PCGAMGSetEigenvalues"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGSetEigenvalues.html">PCGAMGSetEigenvalues</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a> emax, <a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a> emin)</font></strong>
<a name="line1223">1223: </a>{
<a name="line1224">1224: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1226">1226: </a> <a href="../../../../../manualpages/Sys/PetscTryMethod.html">PetscTryMethod</a>(pc, <font color="#666666">"PCGAMGSetEigenvalues_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a>, <a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a>), (pc, emax, emin));
<a name="line1227">1227: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1228">1228: </a>}
<a name="line1230">1230: </a><strong><font color="#4169E1"><a name="PCGAMGSetEigenvalues_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGSetEigenvalues_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a> emax, <a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a> emin)</font></strong>
<a name="line1231">1231: </a>{
<a name="line1232">1232: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1233">1233: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1235">1235: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1236">1236: </a> <a href="../../../../../manualpages/Sys/PetscCheck.html">PetscCheck</a>(emax > emin, <a href="../../../../../manualpages/Sys/PetscObjectComm.html">PetscObjectComm</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc), <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_ERR_ARG_INCOMP</a>, <font color="#666666">"Maximum eigenvalue must be larger than minimum: max %g min %g"</font>, (double)emax, (double)emin);
<a name="line1237">1237: </a> <a href="../../../../../manualpages/Sys/PetscCheck.html">PetscCheck</a>(emax * emin > 0.0, <a href="../../../../../manualpages/Sys/PetscObjectComm.html">PetscObjectComm</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc), <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_ERR_ARG_INCOMP</a>, <font color="#666666">"Both eigenvalues must be of the same sign: max %g min %g"</font>, (double)emax, (double)emin);
<a name="line1238">1238: </a> pc_gamg->emax = emax;
<a name="line1239">1239: </a> pc_gamg->emin = emin;
<a name="line1240">1240: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1241">1241: </a>}
<a name="line1243">1243: </a><font color="#B22222">/*@</font>
<a name="line1244">1244: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGSetReuseInterpolation.html">PCGAMGSetReuseInterpolation</a> - Reuse prolongation when rebuilding a `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>` algebraic multigrid preconditioner</font>
<a name="line1246">1246: </a><font color="#B22222"> Collective</font>
<a name="line1248">1248: </a><font color="#B22222"> Input Parameters:</font>
<a name="line1249">1249: </a><font color="#B22222">+ pc - the preconditioner context</font>
<a name="line1250">1250: </a><font color="#B22222">- n - `<a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>` or `<a href="../../../../../manualpages/Sys/PETSC_FALSE.html">PETSC_FALSE</a>`</font>
<a name="line1252">1252: </a><font color="#B22222"> Options Database Key:</font>
<a name="line1253">1253: </a><font color="#B22222">. -pc_gamg_reuse_interpolation <true,false> - reuse the previous interpolation</font>
<a name="line1255">1255: </a><font color="#B22222"> Level: intermediate</font>
<a name="line1257">1257: </a><font color="#B22222"> Note:</font>
<a name="line1258">1258: </a><font color="#B22222"> May negatively affect the convergence rate of the method on new matrices if the matrix entries change a great deal, but allows</font>
<a name="line1259">1259: </a><font color="#B22222"> rebuilding the preconditioner quicker.</font>
<a name="line1261">1261: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`</font>
<a name="line1262">1262: </a><font color="#B22222">@*/</font>
<a name="line1263">1263: </a><strong><font color="#4169E1"><a name="PCGAMGSetReuseInterpolation"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGSetReuseInterpolation.html">PCGAMGSetReuseInterpolation</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> n)</font></strong>
<a name="line1264">1264: </a>{
<a name="line1265">1265: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1267">1267: </a> <a href="../../../../../manualpages/Sys/PetscTryMethod.html">PetscTryMethod</a>(pc, <font color="#666666">"PCGAMGSetReuseInterpolation_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a>), (pc, n));
<a name="line1268">1268: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1269">1269: </a>}
<a name="line1271">1271: </a><strong><font color="#4169E1"><a name="PCGAMGSetReuseInterpolation_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGSetReuseInterpolation_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> n)</font></strong>
<a name="line1272">1272: </a>{
<a name="line1273">1273: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1274">1274: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1276">1276: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1277">1277: </a> pc_gamg->reuse_prol = n;
<a name="line1278">1278: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1279">1279: </a>}
<a name="line1281">1281: </a><font color="#B22222">/*@</font>
<a name="line1282">1282: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGASMSetUseAggs.html">PCGAMGASMSetUseAggs</a> - Have the `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>` smoother on each level use `<a href="../../../../../manualpages/PC/PCASM.html">PCASM</a>` where the aggregates defined by the coarsening process are</font>
<a name="line1283">1283: </a><font color="#B22222"> the subdomains for the additive Schwarz preconditioner used as the smoother</font>
<a name="line1285">1285: </a><font color="#B22222"> Collective</font>
<a name="line1287">1287: </a><font color="#B22222"> Input Parameters:</font>
<a name="line1288">1288: </a><font color="#B22222">+ pc - the preconditioner context</font>
<a name="line1289">1289: </a><font color="#B22222">- flg - `<a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>` to use aggregates, `<a href="../../../../../manualpages/Sys/PETSC_FALSE.html">PETSC_FALSE</a>` to not</font>
<a name="line1291">1291: </a><font color="#B22222"> Options Database Key:</font>
<a name="line1292">1292: </a><font color="#B22222">. -pc_gamg_asm_use_agg <true,false> - use aggregates to define the additive Schwarz subdomains</font>
<a name="line1294">1294: </a><font color="#B22222"> Level: intermediate</font>
<a name="line1296">1296: </a><font color="#B22222"> Note:</font>
<a name="line1297">1297: </a><font color="#B22222"> This option automatically sets the preconditioner on the levels to be `<a href="../../../../../manualpages/PC/PCASM.html">PCASM</a>`.</font>
<a name="line1299">1299: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`, `<a href="../../../../../manualpages/PC/PCASM.html">PCASM</a>`, `<a href="../../../../../manualpages/PC/PCSetType.html">PCSetType</a>`</font>
<a name="line1300">1300: </a><font color="#B22222">@*/</font>
<a name="line1301">1301: </a><strong><font color="#4169E1"><a name="PCGAMGASMSetUseAggs"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGASMSetUseAggs.html">PCGAMGASMSetUseAggs</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> flg)</font></strong>
<a name="line1302">1302: </a>{
<a name="line1303">1303: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1305">1305: </a> <a href="../../../../../manualpages/Sys/PetscTryMethod.html">PetscTryMethod</a>(pc, <font color="#666666">"PCGAMGASMSetUseAggs_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a>), (pc, flg));
<a name="line1306">1306: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1307">1307: </a>}
<a name="line1309">1309: </a><strong><font color="#4169E1"><a name="PCGAMGASMSetUseAggs_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGASMSetUseAggs_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> flg)</font></strong>
<a name="line1310">1310: </a>{
<a name="line1311">1311: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1312">1312: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1314">1314: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1315">1315: </a> pc_gamg->use_aggs_in_asm = flg;
<a name="line1316">1316: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1317">1317: </a>}
<a name="line1319">1319: </a><font color="#B22222">/*@</font>
<a name="line1320">1320: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGSetParallelCoarseGridSolve.html">PCGAMGSetParallelCoarseGridSolve</a> - allow a parallel coarse grid solver</font>
<a name="line1322">1322: </a><font color="#B22222"> Collective</font>
<a name="line1324">1324: </a><font color="#B22222"> Input Parameters:</font>
<a name="line1325">1325: </a><font color="#B22222">+ pc - the preconditioner context</font>
<a name="line1326">1326: </a><font color="#B22222">- flg - `<a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>` to not force coarse grid onto one processor</font>
<a name="line1328">1328: </a><font color="#B22222"> Options Database Key:</font>
<a name="line1329">1329: </a><font color="#B22222">. -pc_gamg_parallel_coarse_grid_solver - use a parallel coarse grid solver</font>
<a name="line1331">1331: </a><font color="#B22222"> Level: intermediate</font>
<a name="line1333">1333: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`, `<a href="../../../../../manualpages/PC/PCGAMGSetCoarseGridLayoutType.html">PCGAMGSetCoarseGridLayoutType</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGSetCpuPinCoarseGrids.html">PCGAMGSetCpuPinCoarseGrids</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGSetRankReductionFactors.html">PCGAMGSetRankReductionFactors</a>()`</font>
<a name="line1334">1334: </a><font color="#B22222">@*/</font>
<a name="line1335">1335: </a><strong><font color="#4169E1"><a name="PCGAMGSetParallelCoarseGridSolve"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGSetParallelCoarseGridSolve.html">PCGAMGSetParallelCoarseGridSolve</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> flg)</font></strong>
<a name="line1336">1336: </a>{
<a name="line1337">1337: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1339">1339: </a> <a href="../../../../../manualpages/Sys/PetscTryMethod.html">PetscTryMethod</a>(pc, <font color="#666666">"PCGAMGSetParallelCoarseGridSolve_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a>), (pc, flg));
<a name="line1340">1340: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1341">1341: </a>}
<a name="line1343">1343: </a><strong><font color="#4169E1"><a name="PCGAMGSetParallelCoarseGridSolve_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGSetParallelCoarseGridSolve_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> flg)</font></strong>
<a name="line1344">1344: </a>{
<a name="line1345">1345: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1346">1346: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1348">1348: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1349">1349: </a> pc_gamg->use_parallel_coarse_grid_solver = flg;
<a name="line1350">1350: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1351">1351: </a>}
<a name="line1353">1353: </a><font color="#B22222">/*@</font>
<a name="line1354">1354: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGSetCpuPinCoarseGrids.html">PCGAMGSetCpuPinCoarseGrids</a> - pin the coarse grids created in `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>` to run only on the CPU since the problems may be too small to run efficiently on the GPUs</font>
<a name="line1356">1356: </a><font color="#B22222"> Collective</font>
<a name="line1358">1358: </a><font color="#B22222"> Input Parameters:</font>
<a name="line1359">1359: </a><font color="#B22222">+ pc - the preconditioner context</font>
<a name="line1360">1360: </a><font color="#B22222">- flg - `<a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>` to pin coarse grids to the CPU</font>
<a name="line1362">1362: </a><font color="#B22222"> Options Database Key:</font>
<a name="line1363">1363: </a><font color="#B22222">. -pc_gamg_cpu_pin_coarse_grids - pin the coarse grids to the CPU</font>
<a name="line1365">1365: </a><font color="#B22222"> Level: intermediate</font>
<a name="line1367">1367: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`, `<a href="../../../../../manualpages/PC/PCGAMGSetCoarseGridLayoutType.html">PCGAMGSetCoarseGridLayoutType</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGSetParallelCoarseGridSolve.html">PCGAMGSetParallelCoarseGridSolve</a>()`</font>
<a name="line1368">1368: </a><font color="#B22222">@*/</font>
<a name="line1369">1369: </a><strong><font color="#4169E1"><a name="PCGAMGSetCpuPinCoarseGrids"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGSetCpuPinCoarseGrids.html">PCGAMGSetCpuPinCoarseGrids</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> flg)</font></strong>
<a name="line1370">1370: </a>{
<a name="line1371">1371: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1373">1373: </a> <a href="../../../../../manualpages/Sys/PetscTryMethod.html">PetscTryMethod</a>(pc, <font color="#666666">"PCGAMGSetCpuPinCoarseGrids_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a>), (pc, flg));
<a name="line1374">1374: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1375">1375: </a>}
<a name="line1377">1377: </a><strong><font color="#4169E1"><a name="PCGAMGSetCpuPinCoarseGrids_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGSetCpuPinCoarseGrids_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> flg)</font></strong>
<a name="line1378">1378: </a>{
<a name="line1379">1379: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1380">1380: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1382">1382: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1383">1383: </a> pc_gamg->cpu_pin_coarse_grids = flg;
<a name="line1384">1384: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1385">1385: </a>}
<a name="line1387">1387: </a><font color="#B22222">/*@</font>
<a name="line1388">1388: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGSetCoarseGridLayoutType.html">PCGAMGSetCoarseGridLayoutType</a> - place coarse grids on processors with natural order (compact type)</font>
<a name="line1390">1390: </a><font color="#B22222"> Collective</font>
<a name="line1392">1392: </a><font color="#B22222"> Input Parameters:</font>
<a name="line1393">1393: </a><font color="#B22222">+ pc - the preconditioner context</font>
<a name="line1394">1394: </a><font color="#B22222">- flg - `<a href="../../../../../manualpages/PC/PCGAMGLayoutType.html">PCGAMGLayoutType</a>` type, either `<a href="../../../../../manualpages/PC/PCGAMGLayoutType.html">PCGAMG_LAYOUT_COMPACT</a>` or `<a href="../../../../../manualpages/PC/PCGAMGLayoutType.html">PCGAMG_LAYOUT_SPREAD</a>`</font>
<a name="line1396">1396: </a><font color="#B22222"> Options Database Key:</font>
<a name="line1397">1397: </a><font color="#B22222">. -pc_gamg_coarse_grid_layout_type - place the coarse grids with natural ordering</font>
<a name="line1399">1399: </a><font color="#B22222"> Level: intermediate</font>
<a name="line1401">1401: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`, `<a href="../../../../../manualpages/PC/PCGAMGSetParallelCoarseGridSolve.html">PCGAMGSetParallelCoarseGridSolve</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGSetCpuPinCoarseGrids.html">PCGAMGSetCpuPinCoarseGrids</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGLayoutType.html">PCGAMGLayoutType</a>`, `<a href="../../../../../manualpages/PC/PCGAMGLayoutType.html">PCGAMG_LAYOUT_COMPACT</a>`, `<a href="../../../../../manualpages/PC/PCGAMGLayoutType.html">PCGAMG_LAYOUT_SPREAD</a>`</font>
<a name="line1402">1402: </a><font color="#B22222">@*/</font>
<a name="line1403">1403: </a><strong><font color="#4169E1"><a name="PCGAMGSetCoarseGridLayoutType"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGSetCoarseGridLayoutType.html">PCGAMGSetCoarseGridLayoutType</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/PC/PCGAMGLayoutType.html">PCGAMGLayoutType</a> flg)</font></strong>
<a name="line1404">1404: </a>{
<a name="line1405">1405: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1407">1407: </a> <a href="../../../../../manualpages/Sys/PetscTryMethod.html">PetscTryMethod</a>(pc, <font color="#666666">"PCGAMGSetCoarseGridLayoutType_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/PC/PCGAMGLayoutType.html">PCGAMGLayoutType</a>), (pc, flg));
<a name="line1408">1408: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1409">1409: </a>}
<a name="line1411">1411: </a><strong><font color="#4169E1"><a name="PCGAMGSetCoarseGridLayoutType_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGSetCoarseGridLayoutType_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/PC/PCGAMGLayoutType.html">PCGAMGLayoutType</a> flg)</font></strong>
<a name="line1412">1412: </a>{
<a name="line1413">1413: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1414">1414: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1416">1416: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1417">1417: </a> pc_gamg->layout_type = flg;
<a name="line1418">1418: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1419">1419: </a>}
<a name="line1421">1421: </a><font color="#B22222">/*@</font>
<a name="line1422">1422: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGSetNlevels.html">PCGAMGSetNlevels</a> - Sets the maximum number of levels `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>` will use</font>
<a name="line1424">1424: </a><font color="#B22222"> Collective</font>
<a name="line1426">1426: </a><font color="#B22222"> Input Parameters:</font>
<a name="line1427">1427: </a><font color="#B22222">+ pc - the preconditioner</font>
<a name="line1428">1428: </a><font color="#B22222">- n - the maximum number of levels to use</font>
<a name="line1430">1430: </a><font color="#B22222"> Options Database Key:</font>
<a name="line1431">1431: </a><font color="#B22222">. -pc_mg_levels <n> - set the maximum number of levels to allow</font>
<a name="line1433">1433: </a><font color="#B22222"> Level: intermediate</font>
<a name="line1435">1435: </a><font color="#B22222"> Developer Notes:</font>
<a name="line1436">1436: </a><font color="#B22222"> Should be called `PCGAMGSetMaximumNumberlevels()` and possible be shared with `<a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>`</font>
<a name="line1438">1438: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`</font>
<a name="line1439">1439: </a><font color="#B22222">@*/</font>
<a name="line1440">1440: </a><strong><font color="#4169E1"><a name="PCGAMGSetNlevels"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGSetNlevels.html">PCGAMGSetNlevels</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> n)</font></strong>
<a name="line1441">1441: </a>{
<a name="line1442">1442: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1444">1444: </a> <a href="../../../../../manualpages/Sys/PetscTryMethod.html">PetscTryMethod</a>(pc, <font color="#666666">"PCGAMGSetNlevels_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a>), (pc, n));
<a name="line1445">1445: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1446">1446: </a>}
<a name="line1448">1448: </a><strong><font color="#4169E1"><a name="PCGAMGSetNlevels_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGSetNlevels_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> n)</font></strong>
<a name="line1449">1449: </a>{
<a name="line1450">1450: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1451">1451: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1453">1453: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1454">1454: </a> pc_gamg->Nlevels = n;
<a name="line1455">1455: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1456">1456: </a>}
<a name="line1458">1458: </a><font color="#B22222">/*@</font>
<a name="line1459">1459: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGASMSetHEM.html">PCGAMGASMSetHEM</a> - Sets the number of HEM matching passed</font>
<a name="line1461">1461: </a><font color="#B22222"> Collective</font>
<a name="line1463">1463: </a><font color="#B22222"> Input Parameters:</font>
<a name="line1464">1464: </a><font color="#B22222">+ pc - the preconditioner</font>
<a name="line1465">1465: </a><font color="#B22222">- n - number of HEM matching passed to construct ASM subdomains</font>
<a name="line1467">1467: </a><font color="#B22222"> Options Database Key:</font>
<a name="line1468">1468: </a><font color="#B22222">. -pc_gamg_asm_hem <n> - set the number of HEM matching passed</font>
<a name="line1470">1470: </a><font color="#B22222"> Level: intermediate</font>
<a name="line1472">1472: </a><font color="#B22222"> Developer Notes:</font>
<a name="line1473">1473: </a><font color="#B22222"> Should be called `PCGAMGSetMaximumNumberlevels()` and possible be shared with `<a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>`</font>
<a name="line1475">1475: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`</font>
<a name="line1476">1476: </a><font color="#B22222">@*/</font>
<a name="line1477">1477: </a><strong><font color="#4169E1"><a name="PCGAMGASMSetHEM"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGASMSetHEM.html">PCGAMGASMSetHEM</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> n)</font></strong>
<a name="line1478">1478: </a>{
<a name="line1479">1479: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1481">1481: </a> <a href="../../../../../manualpages/Sys/PetscTryMethod.html">PetscTryMethod</a>(pc, <font color="#666666">"PCGAMGASMSetHEM_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a>), (pc, n));
<a name="line1482">1482: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1483">1483: </a>}
<a name="line1485">1485: </a><strong><font color="#4169E1"><a name="PCGAMGASMSetHEM_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGASMSetHEM_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> n)</font></strong>
<a name="line1486">1486: </a>{
<a name="line1487">1487: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1488">1488: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1490">1490: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1491">1491: </a> pc_gamg->asm_hem_aggs = n;
<a name="line1492">1492: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1493">1493: </a>}
<a name="line1495">1495: </a><font color="#B22222">/*@</font>
<a name="line1496">1496: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGSetThreshold.html">PCGAMGSetThreshold</a> - Relative threshold to use for dropping edges in aggregation graph</font>
<a name="line1498">1498: </a><font color="#B22222"> Not Collective</font>
<a name="line1500">1500: </a><font color="#B22222"> Input Parameters:</font>
<a name="line1501">1501: </a><font color="#B22222">+ pc - the preconditioner context</font>
<a name="line1502">1502: </a><font color="#B22222">. v - array of threshold values for finest n levels; 0.0 means keep all nonzero entries in the graph; negative means keep even zero entries in the graph</font>
<a name="line1503">1503: </a><font color="#B22222">- n - number of threshold values provided in array</font>
<a name="line1505">1505: </a><font color="#B22222"> Options Database Key:</font>
<a name="line1506">1506: </a><font color="#B22222">. -pc_gamg_threshold <threshold> - the threshold to drop edges</font>
<a name="line1508">1508: </a><font color="#B22222"> Level: intermediate</font>
<a name="line1510">1510: </a><font color="#B22222"> Notes:</font>
<a name="line1511">1511: </a><font color="#B22222"> Increasing the threshold decreases the rate of coarsening. Conversely reducing the threshold increases the rate of coarsening (aggressive coarsening) and thereby reduces the complexity of the coarse grids, and generally results in slower solver converge rates. Reducing coarse grid complexity reduced the complexity of Galerkin coarse grid construction considerably.</font>
<a name="line1512">1512: </a><font color="#B22222"> Before coarsening or aggregating the graph, `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>` removes small values from the graph with this threshold, and thus reducing the coupling in the graph and a different (perhaps better) coarser set of points.</font>
<a name="line1514">1514: </a><font color="#B22222"> If `n` is less than the total number of coarsenings (see `<a href="../../../../../manualpages/PC/PCGAMGSetNlevels.html">PCGAMGSetNlevels</a>()`), then threshold scaling (see `<a href="../../../../../manualpages/PC/PCGAMGSetThresholdScale.html">PCGAMGSetThresholdScale</a>()`) is used for each successive coarsening.</font>
<a name="line1515">1515: </a><font color="#B22222"> In this case, `<a href="../../../../../manualpages/PC/PCGAMGSetThresholdScale.html">PCGAMGSetThresholdScale</a>()` must be called before `<a href="../../../../../manualpages/PC/PCGAMGSetThreshold.html">PCGAMGSetThreshold</a>()`.</font>
<a name="line1516">1516: </a><font color="#B22222"> If `n` is greater than the total number of levels, the excess entries in threshold will not be used.</font>
<a name="line1518">1518: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`, `<a href="../../../../../manualpages/PC/PCGAMGSetAggressiveLevels.html">PCGAMGSetAggressiveLevels</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGMISkSetAggressive.html">PCGAMGMISkSetAggressive</a>()`, `PCGAMGSetMinDegreeOrderingMISk()`, `<a href="../../../../../manualpages/PC/PCGAMGSetThresholdScale.html">PCGAMGSetThresholdScale</a>()`</font>
<a name="line1519">1519: </a><font color="#B22222">@*/</font>
<a name="line1520">1520: </a><strong><font color="#4169E1"><a name="PCGAMGSetThreshold"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGSetThreshold.html">PCGAMGSetThreshold</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a> v[], <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> n)</font></strong>
<a name="line1521">1521: </a>{
<a name="line1522">1522: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1524">1524: </a> <font color="#4169E1">if</font> (n) PetscAssertPointer(v, 2);
<a name="line1525">1525: </a> <a href="../../../../../manualpages/Sys/PetscTryMethod.html">PetscTryMethod</a>(pc, <font color="#666666">"PCGAMGSetThreshold_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a>[], <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a>), (pc, v, n));
<a name="line1526">1526: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1527">1527: </a>}
<a name="line1529">1529: </a><strong><font color="#4169E1"><a name="PCGAMGSetThreshold_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGSetThreshold_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a> v[], <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> n)</font></strong>
<a name="line1530">1530: </a>{
<a name="line1531">1531: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1532">1532: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1533">1533: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> i;
<a name="line1535">1535: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1536">1536: </a> <font color="#4169E1">for</font> (i = 0; i < <a href="../../../../../manualpages/Sys/PetscMin.html">PetscMin</a>(n, PETSC_MG_MAXLEVELS); i++) pc_gamg->threshold[i] = v[i];
<a name="line1537">1537: </a> <font color="#4169E1">for</font> (; i < PETSC_MG_MAXLEVELS; i++) pc_gamg->threshold[i] = pc_gamg->threshold[i - 1] * pc_gamg->threshold_scale;
<a name="line1538">1538: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1539">1539: </a>}
<a name="line1541">1541: </a><font color="#B22222">/*@</font>
<a name="line1542">1542: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGSetRankReductionFactors.html">PCGAMGSetRankReductionFactors</a> - Set a manual schedule for MPI rank reduction on coarse grids</font>
<a name="line1544">1544: </a><font color="#B22222"> Collective</font>
<a name="line1546">1546: </a><font color="#B22222"> Input Parameters:</font>
<a name="line1547">1547: </a><font color="#B22222">+ pc - the preconditioner context</font>
<a name="line1548">1548: </a><font color="#B22222">. v - array of reduction factors. 0 for first value forces a reduction to one process/device on first level in CUDA</font>
<a name="line1549">1549: </a><font color="#B22222">- n - number of values provided in array</font>
<a name="line1551">1551: </a><font color="#B22222"> Options Database Key:</font>
<a name="line1552">1552: </a><font color="#B22222">. -pc_gamg_rank_reduction_factors <factors> - provide the schedule</font>
<a name="line1554">1554: </a><font color="#B22222"> Level: intermediate</font>
<a name="line1556">1556: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`, `<a href="../../../../../manualpages/PC/PCGAMGSetProcEqLim.html">PCGAMGSetProcEqLim</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGSetCoarseEqLim.html">PCGAMGSetCoarseEqLim</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGSetParallelCoarseGridSolve.html">PCGAMGSetParallelCoarseGridSolve</a>()`</font>
<a name="line1557">1557: </a><font color="#B22222">@*/</font>
<a name="line1558">1558: </a><strong><font color="#4169E1"><a name="PCGAMGSetRankReductionFactors"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGSetRankReductionFactors.html">PCGAMGSetRankReductionFactors</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> v[], <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> n)</font></strong>
<a name="line1559">1559: </a>{
<a name="line1560">1560: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1562">1562: </a> <font color="#4169E1">if</font> (n) PetscAssertPointer(v, 2);
<a name="line1563">1563: </a> <a href="../../../../../manualpages/Sys/PetscTryMethod.html">PetscTryMethod</a>(pc, <font color="#666666">"PCGAMGSetRankReductionFactors_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a>[], <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a>), (pc, v, n));
<a name="line1564">1564: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1565">1565: </a>}
<a name="line1567">1567: </a><strong><font color="#4169E1"><a name="PCGAMGSetRankReductionFactors_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGSetRankReductionFactors_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> v[], <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> n)</font></strong>
<a name="line1568">1568: </a>{
<a name="line1569">1569: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1570">1570: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1571">1571: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> i;
<a name="line1573">1573: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1574">1574: </a> <font color="#4169E1">for</font> (i = 0; i < <a href="../../../../../manualpages/Sys/PetscMin.html">PetscMin</a>(n, PETSC_MG_MAXLEVELS); i++) pc_gamg->level_reduction_factors[i] = v[i];
<a name="line1575">1575: </a> <font color="#4169E1">for</font> (; i < PETSC_MG_MAXLEVELS; i++) pc_gamg->level_reduction_factors[i] = -1; <font color="#B22222">/* 0 stop putting one process/device on first level */</font>
<a name="line1576">1576: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1577">1577: </a>}
<a name="line1579">1579: </a><font color="#B22222">/*@</font>
<a name="line1580">1580: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGSetThresholdScale.html">PCGAMGSetThresholdScale</a> - Relative threshold reduction at each level</font>
<a name="line1582">1582: </a><font color="#B22222"> Not Collective</font>
<a name="line1584">1584: </a><font color="#B22222"> Input Parameters:</font>
<a name="line1585">1585: </a><font color="#B22222">+ pc - the preconditioner context</font>
<a name="line1586">1586: </a><font color="#B22222">- v - the threshold value reduction, usually < 1.0</font>
<a name="line1588">1588: </a><font color="#B22222"> Options Database Key:</font>
<a name="line1589">1589: </a><font color="#B22222">. -pc_gamg_threshold_scale <v> - set the relative threshold reduction on each level</font>
<a name="line1591">1591: </a><font color="#B22222"> Level: advanced</font>
<a name="line1593">1593: </a><font color="#B22222"> Note:</font>
<a name="line1594">1594: </a><font color="#B22222"> The initial threshold (for an arbitrary number of levels starting from the finest) can be set with `<a href="../../../../../manualpages/PC/PCGAMGSetThreshold.html">PCGAMGSetThreshold</a>()`.</font>
<a name="line1595">1595: </a><font color="#B22222"> This scaling is used for each subsequent coarsening, but must be called before `<a href="../../../../../manualpages/PC/PCGAMGSetThreshold.html">PCGAMGSetThreshold</a>()`.</font>
<a name="line1597">1597: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`, `<a href="../../../../../manualpages/PC/PCGAMGSetThreshold.html">PCGAMGSetThreshold</a>()`</font>
<a name="line1598">1598: </a><font color="#B22222">@*/</font>
<a name="line1599">1599: </a><strong><font color="#4169E1"><a name="PCGAMGSetThresholdScale"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGSetThresholdScale.html">PCGAMGSetThresholdScale</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a> v)</font></strong>
<a name="line1600">1600: </a>{
<a name="line1601">1601: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1603">1603: </a> <a href="../../../../../manualpages/Sys/PetscTryMethod.html">PetscTryMethod</a>(pc, <font color="#666666">"PCGAMGSetThresholdScale_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a>), (pc, v));
<a name="line1604">1604: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1605">1605: </a>}
<a name="line1607">1607: </a><strong><font color="#4169E1"><a name="PCGAMGSetThresholdScale_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGSetThresholdScale_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a> v)</font></strong>
<a name="line1608">1608: </a>{
<a name="line1609">1609: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1610">1610: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1612">1612: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1613">1613: </a> pc_gamg->threshold_scale = v;
<a name="line1614">1614: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1615">1615: </a>}
<a name="line1617">1617: </a><font color="#B22222">/*@</font>
<a name="line1618">1618: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGSetType.html">PCGAMGSetType</a> - Set the type of algorithm `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>` should use</font>
<a name="line1620">1620: </a><font color="#B22222"> Collective</font>
<a name="line1622">1622: </a><font color="#B22222"> Input Parameters:</font>
<a name="line1623">1623: </a><font color="#B22222">+ pc - the preconditioner context</font>
<a name="line1624">1624: </a><font color="#B22222">- type - `<a href="../../../../../manualpages/PC/PCGAMGAGG.html">PCGAMGAGG</a>`, `PCGAMGGEO`, or `PCGAMGCLASSICAL`</font>
<a name="line1626">1626: </a><font color="#B22222"> Options Database Key:</font>
<a name="line1627">1627: </a><font color="#B22222">. -pc_gamg_type <agg,geo,classical> - type of algebraic multigrid to apply - only agg is supported</font>
<a name="line1629">1629: </a><font color="#B22222"> Level: intermediate</font>
<a name="line1631">1631: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMGGetType.html">PCGAMGGetType</a>()`, `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`, `<a href="../../../../../manualpages/PC/PCGAMGType.html">PCGAMGType</a>`</font>
<a name="line1632">1632: </a><font color="#B22222">@*/</font>
<a name="line1633">1633: </a><strong><font color="#4169E1"><a name="PCGAMGSetType"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGSetType.html">PCGAMGSetType</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/PC/PCGAMGType.html">PCGAMGType</a> type)</font></strong>
<a name="line1634">1634: </a>{
<a name="line1635">1635: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1637">1637: </a> <a href="../../../../../manualpages/Sys/PetscTryMethod.html">PetscTryMethod</a>(pc, <font color="#666666">"PCGAMGSetType_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/PC/PCGAMGType.html">PCGAMGType</a>), (pc, type));
<a name="line1638">1638: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1639">1639: </a>}
<a name="line1641">1641: </a><font color="#B22222">/*@</font>
<a name="line1642">1642: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGGetType.html">PCGAMGGetType</a> - Get the type of algorithm `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>` will use</font>
<a name="line1644">1644: </a><font color="#B22222"> Collective</font>
<a name="line1646">1646: </a><font color="#B22222"> Input Parameter:</font>
<a name="line1647">1647: </a><font color="#B22222">. pc - the preconditioner context</font>
<a name="line1649">1649: </a><font color="#B22222"> Output Parameter:</font>
<a name="line1650">1650: </a><font color="#B22222">. type - the type of algorithm used</font>
<a name="line1652">1652: </a><font color="#B22222"> Level: intermediate</font>
<a name="line1654">1654: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`, `<a href="../../../../../manualpages/PC/PCGAMGSetType.html">PCGAMGSetType</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGType.html">PCGAMGType</a>`</font>
<a name="line1655">1655: </a><font color="#B22222">@*/</font>
<a name="line1656">1656: </a><strong><font color="#4169E1"><a name="PCGAMGGetType"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGGetType.html">PCGAMGGetType</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/PC/PCGAMGType.html">PCGAMGType</a> *type)</font></strong>
<a name="line1657">1657: </a>{
<a name="line1658">1658: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1660">1660: </a> <a href="../../../../../manualpages/Sys/PetscUseMethod.html">PetscUseMethod</a>(pc, <font color="#666666">"PCGAMGGetType_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/PC/PCGAMGType.html">PCGAMGType</a> *), (pc, type));
<a name="line1661">1661: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1662">1662: </a>}
<a name="line1664">1664: </a><strong><font color="#4169E1"><a name="PCGAMGGetType_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGGetType_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/PC/PCGAMGType.html">PCGAMGType</a> *type)</font></strong>
<a name="line1665">1665: </a>{
<a name="line1666">1666: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1667">1667: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1669">1669: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1670">1670: </a> *type = pc_gamg->type;
<a name="line1671">1671: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1672">1672: </a>}
<a name="line1674">1674: </a><strong><font color="#4169E1"><a name="PCGAMGSetType_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGSetType_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/PC/PCGAMGType.html">PCGAMGType</a> type)</font></strong>
<a name="line1675">1675: </a>{
<a name="line1676">1676: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1677">1677: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1678">1678: </a> <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> (*r)(<a href="../../../../../manualpages/PC/PC.html">PC</a>);
<a name="line1680">1680: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1681">1681: </a> pc_gamg->type = type;
<a name="line1682">1682: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFunctionListFind.html">PetscFunctionListFind</a>(GAMGList, type, &r));
<a name="line1683">1683: </a> <a href="../../../../../manualpages/Sys/PetscCheck.html">PetscCheck</a>(r, <a href="../../../../../manualpages/Sys/PetscObjectComm.html">PetscObjectComm</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc), <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_ERR_ARG_UNKNOWN_TYPE</a>, <font color="#666666">"Unknown GAMG type %s given"</font>, type);
<a name="line1684">1684: </a> <font color="#4169E1">if</font> (pc_gamg->ops->destroy) {
<a name="line1685">1685: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>((*pc_gamg->ops->destroy)(pc));
<a name="line1686">1686: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscMemzero.html">PetscMemzero</a>(pc_gamg->ops, <font color="#4169E1">sizeof</font>(<font color="#4169E1">struct _PCGAMGOps</font>)));
<a name="line1687">1687: </a> pc_gamg->ops->createlevel = PCGAMGCreateLevel_GAMG;
<a name="line1688">1688: </a> <font color="#B22222">/* cleaning up common data in pc_gamg - this should disappear someday */</font>
<a name="line1689">1689: </a> pc_gamg->data_cell_cols = 0;
<a name="line1690">1690: </a> pc_gamg->data_cell_rows = 0;
<a name="line1691">1691: </a> pc_gamg->orig_data_cell_cols = 0;
<a name="line1692">1692: </a> pc_gamg->orig_data_cell_rows = 0;
<a name="line1693">1693: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFree.html">PetscFree</a>(pc_gamg->data));
<a name="line1694">1694: </a> pc_gamg->data_sz = 0;
<a name="line1695">1695: </a> }
<a name="line1696">1696: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFree.html">PetscFree</a>(pc_gamg->gamg_type_name));
<a name="line1697">1697: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscStrallocpy.html">PetscStrallocpy</a>(type, &pc_gamg->gamg_type_name));
<a name="line1698">1698: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>((*r)(pc));
<a name="line1699">1699: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1700">1700: </a>}
<a name="line1702">1702: </a><strong><font color="#4169E1"><a name="PCView_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCView_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Viewer/PetscViewer.html">PetscViewer</a> viewer)</font></strong>
<a name="line1703">1703: </a>{
<a name="line1704">1704: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1705">1705: </a> PC_MG_Levels **mglevels = mg->levels;
<a name="line1706">1706: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1707">1707: </a> <a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a> gc, oc;
<a name="line1709">1709: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1710">1710: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPrintf.html">PetscViewerASCIIPrintf</a>(viewer, <font color="#666666">" GAMG specific options\n"</font>));
<a name="line1711">1711: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPrintf.html">PetscViewerASCIIPrintf</a>(viewer, <font color="#666666">" Threshold for dropping small values in graph on each level ="</font>));
<a name="line1712">1712: </a> <font color="#4169E1">for</font> (<a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> i = 0; i < mg->nlevels; i++) <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPrintf.html">PetscViewerASCIIPrintf</a>(viewer, <font color="#666666">" %g"</font>, (double)pc_gamg->threshold[i]));
<a name="line1713">1713: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPrintf.html">PetscViewerASCIIPrintf</a>(viewer, <font color="#666666">"\n"</font>));
<a name="line1714">1714: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPrintf.html">PetscViewerASCIIPrintf</a>(viewer, <font color="#666666">" Threshold scaling factor for each level not specified = %g\n"</font>, (double)pc_gamg->threshold_scale));
<a name="line1715">1715: </a> <font color="#4169E1">if</font> (pc_gamg->use_aggs_in_asm) <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPrintf.html">PetscViewerASCIIPrintf</a>(viewer, <font color="#666666">" Using aggregates from GAMG coarsening process to define subdomains for <a href="../../../../../manualpages/PC/PCASM.html">PCASM</a>\n"</font>)); <font color="#B22222">// this take presedence</font>
<a name="line1716">1716: </a> <font color="#4169E1">else</font> <font color="#4169E1">if</font> (pc_gamg->asm_hem_aggs) {
<a name="line1717">1717: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPrintf.html">PetscViewerASCIIPrintf</a>(viewer, <font color="#666666">" Using aggregates made with %"</font> PetscInt_FMT <font color="#666666">" applications of heavy edge matching (HEM) to define subdomains for <a href="../../../../../manualpages/PC/PCASM.html">PCASM</a>\n"</font>, pc_gamg->asm_hem_aggs));
<a name="line1718">1718: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPushTab.html">PetscViewerASCIIPushTab</a>(viewer));
<a name="line1719">1719: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPushTab.html">PetscViewerASCIIPushTab</a>(viewer));
<a name="line1720">1720: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPushTab.html">PetscViewerASCIIPushTab</a>(viewer));
<a name="line1721">1721: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPushTab.html">PetscViewerASCIIPushTab</a>(viewer));
<a name="line1722">1722: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/MatGraphOperations/MatCoarsenView.html">MatCoarsenView</a>(pc_gamg->asm_crs, viewer));
<a name="line1723">1723: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPopTab.html">PetscViewerASCIIPopTab</a>(viewer));
<a name="line1724">1724: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPopTab.html">PetscViewerASCIIPopTab</a>(viewer));
<a name="line1725">1725: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPopTab.html">PetscViewerASCIIPopTab</a>(viewer));
<a name="line1726">1726: </a> }
<a name="line1727">1727: </a> <font color="#4169E1">if</font> (pc_gamg->use_parallel_coarse_grid_solver) <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPrintf.html">PetscViewerASCIIPrintf</a>(viewer, <font color="#666666">" Using parallel coarse grid solver (all coarse grid equations not put on one process)\n"</font>));
<a name="line1728">1728: </a> <font color="#4169E1">if</font> (pc_gamg->injection_index_size) {
<a name="line1729">1729: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPrintf.html">PetscViewerASCIIPrintf</a>(viewer, <font color="#666666">" Using injection restriction/prolongation on first level, dofs:"</font>));
<a name="line1730">1730: </a> <font color="#4169E1">for</font> (int i = 0; i < pc_gamg->injection_index_size; i++) <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPrintf.html">PetscViewerASCIIPrintf</a>(viewer, <font color="#666666">" %"</font> PetscInt_FMT, pc_gamg->injection_index[i]));
<a name="line1731">1731: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPrintf.html">PetscViewerASCIIPrintf</a>(viewer, <font color="#666666">"\n"</font>));
<a name="line1732">1732: </a> }
<a name="line1733">1733: </a> <font color="#4169E1">if</font> (pc_gamg->ops->view) <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>((*pc_gamg->ops->view)(pc, viewer));
<a name="line1734">1734: </a> gc = oc = 0;
<a name="line1735">1735: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCMGGetGridComplexity.html">PCMGGetGridComplexity</a>(pc, &gc, &oc));
<a name="line1736">1736: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPrintf.html">PetscViewerASCIIPrintf</a>(viewer, <font color="#666666">" Complexity: grid = %g operator = %g\n"</font>, (double)gc, (double)oc));
<a name="line1737">1737: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPrintf.html">PetscViewerASCIIPrintf</a>(viewer, <font color="#666666">" Per-level complexity: op = operator, int = interpolation\n"</font>));
<a name="line1738">1738: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPrintf.html">PetscViewerASCIIPrintf</a>(viewer, <font color="#666666">" #equations | #active PEs | avg nnz/row op | avg nnz/row int\n"</font>));
<a name="line1739">1739: </a> <font color="#4169E1">for</font> (<a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> i = 0; i < mg->nlevels; i++) {
<a name="line1740">1740: </a> <a href="../../../../../manualpages/Mat/MatInfo.html">MatInfo</a> info;
<a name="line1741">1741: </a> <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> A;
<a name="line1742">1742: </a> <a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a> rd[3];
<a name="line1743">1743: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> rst, ren, N;
<a name="line1745">1745: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/KSP/KSPGetOperators.html">KSPGetOperators</a>(mglevels[i]->smoothd, NULL, &A));
<a name="line1746">1746: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetOwnershipRange.html">MatGetOwnershipRange</a>(A, &rst, &ren));
<a name="line1747">1747: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetSize.html">MatGetSize</a>(A, &N, NULL));
<a name="line1748">1748: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetInfo.html">MatGetInfo</a>(A, <a href="../../../../../manualpages/Mat/MatInfoType.html">MAT_LOCAL</a>, &info));
<a name="line1749">1749: </a> rd[0] = (ren - rst > 0) ? 1 : 0;
<a name="line1750">1750: </a> rd[1] = info.nz_used;
<a name="line1751">1751: </a> rd[2] = 0;
<a name="line1752">1752: </a> <font color="#4169E1">if</font> (i) {
<a name="line1753">1753: </a> <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> P;
<a name="line1754">1754: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCMGGetInterpolation.html">PCMGGetInterpolation</a>(pc, i, &P));
<a name="line1755">1755: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Mat/MatGetInfo.html">MatGetInfo</a>(P, <a href="../../../../../manualpages/Mat/MatInfoType.html">MAT_LOCAL</a>, &info));
<a name="line1756">1756: </a> rd[2] = info.nz_used;
<a name="line1757">1757: </a> }
<a name="line1758">1758: </a> <a href="../../../../../manualpages/Sys/PetscCallMPI.html">PetscCallMPI</a>(<a href="../../../../../manualpages/Sys/MPIU_Allreduce.html">MPIU_Allreduce</a>(MPI_IN_PLACE, rd, 3, <a href="../../../../../manualpages/Sys/MPIU_REAL.html">MPIU_REAL</a>, MPIU_SUM, <a href="../../../../../manualpages/Sys/PetscObjectComm.html">PetscObjectComm</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc)));
<a name="line1759">1759: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Viewer/PetscViewerASCIIPrintf.html">PetscViewerASCIIPrintf</a>(viewer, <font color="#666666">" %12"</font> PetscInt_FMT <font color="#666666">" %12"</font> PetscInt_FMT <font color="#666666">" %12"</font> PetscInt_FMT <font color="#666666">" %12"</font> PetscInt_FMT <font color="#666666">"\n"</font>, N, (<a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a>)rd[0], (<a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a>)PetscCeilReal(rd[1] / N), (<a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a>)PetscCeilReal(rd[2] / N)));
<a name="line1760">1760: </a> }
<a name="line1761">1761: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1762">1762: </a>}
<a name="line1764">1764: </a><font color="#B22222">/*@</font>
<a name="line1765">1765: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGSetInjectionIndex.html">PCGAMGSetInjectionIndex</a> - Array of subset of variables per vertex to inject into coarse grid space</font>
<a name="line1767">1767: </a><font color="#B22222"> Logically Collective</font>
<a name="line1769">1769: </a><font color="#B22222"> Input Parameters:</font>
<a name="line1770">1770: </a><font color="#B22222">+ pc - the coarsen context</font>
<a name="line1771">1771: </a><font color="#B22222">. n - number of indices</font>
<a name="line1772">1772: </a><font color="#B22222">- idx - array of indices</font>
<a name="line1774">1774: </a><font color="#B22222"> Options Database Key:</font>
<a name="line1775">1775: </a><font color="#B22222">. -pc_gamg_injection_index - array of subset of variables per vertex to use for injection coarse grid space</font>
<a name="line1777">1777: </a><font color="#B22222"> Level: intermediate</font>
<a name="line1779">1779: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`</font>
<a name="line1780">1780: </a><font color="#B22222">@*/</font>
<a name="line1781">1781: </a><strong><font color="#4169E1"><a name="PCGAMGSetInjectionIndex"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGSetInjectionIndex.html">PCGAMGSetInjectionIndex</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> n, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> idx[])</font></strong>
<a name="line1782">1782: </a>{
<a name="line1783">1783: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1786">1786: </a> <a href="../../../../../manualpages/Sys/PetscTryMethod.html">PetscTryMethod</a>(pc, <font color="#666666">"PCGAMGSetInjectionIndex_C"</font>, (<a href="../../../../../manualpages/PC/PC.html">PC</a>, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a>, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a>[]), (pc, n, idx));
<a name="line1787">1787: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1788">1788: </a>}
<a name="line1790">1790: </a><strong><font color="#4169E1"><a name="PCGAMGSetInjectionIndex_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCGAMGSetInjectionIndex_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> n, <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> idx[])</font></strong>
<a name="line1791">1791: </a>{
<a name="line1792">1792: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1793">1793: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1795">1795: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1796">1796: </a> pc_gamg->injection_index_size = n;
<a name="line1797">1797: </a> <a href="../../../../../manualpages/Sys/PetscCheck.html">PetscCheck</a>(n < MAT_COARSEN_STRENGTH_INDEX_SIZE, <a href="../../../../../manualpages/Sys/PetscObjectComm.html">PetscObjectComm</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc), <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_ERR_ARG_INCOMP</a>, <font color="#666666">"array size %"</font> PetscInt_FMT <font color="#666666">" larger than max %d"</font>, n, MAT_COARSEN_STRENGTH_INDEX_SIZE);
<a name="line1798">1798: </a> <font color="#4169E1">for</font> (<a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> i = 0; i < n; i++) pc_gamg->injection_index[i] = idx[i];
<a name="line1799">1799: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1800">1800: </a>}
<a name="line1802">1802: </a><strong><font color="#4169E1"><a name="PCSetFromOptions_GAMG"></a>static <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCSetFromOptions_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, PetscOptionItems PetscOptionsObject)</font></strong>
<a name="line1803">1803: </a>{
<a name="line1804">1804: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line1805">1805: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line1806">1806: </a> <a href="../../../../../manualpages/Sys/PetscBool.html">PetscBool</a> flag;
<a name="line1807">1807: </a> <a href="../../../../../manualpages/Sys/MPI_Comm.html">MPI_Comm</a> comm;
<a name="line1808">1808: </a> char prefix[256], tname[32];
<a name="line1809">1809: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> i, n;
<a name="line1810">1810: </a> const char *pcpre;
<a name="line1811">1811: </a> static const char *LayoutTypes[] = {<font color="#666666">"compact"</font>, <font color="#666666">"spread"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMGLayoutType.html">PCGAMGLayoutType</a>"</font>, <font color="#666666">"PC_GAMG_LAYOUT"</font>, NULL};
<a name="line1813">1813: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1814">1814: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectGetComm.html">PetscObjectGetComm</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, &comm));
<a name="line1815">1815: </a> <a href="../../../../../manualpages/Sys/PetscOptionsHeadBegin.html">PetscOptionsHeadBegin</a>(PetscOptionsObject, <font color="#666666">"GAMG options"</font>);
<a name="line1816">1816: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsInt.html">PetscOptionsInt</a>(<font color="#666666">"-pc_mg_levels"</font>, <font color="#666666">"Number of Levels"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCMGSetLevels.html">PCMGSetLevels</a>"</font>, -1, &n, &flag));
<a name="line1817">1817: </a> <a href="../../../../../manualpages/Sys/PetscCheck.html">PetscCheck</a>(!flag, comm, <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_ERR_ARG_WRONG</a>, <font color="#666666">"Invalid flag -pc_mg_levels. GAMG does not allow the number of levels to be set."</font>);
<a name="line1818">1818: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsFList.html">PetscOptionsFList</a>(<font color="#666666">"-pc_gamg_type"</font>, <font color="#666666">"Type of AMG method (only 'agg' supported and useful)"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMGSetType.html">PCGAMGSetType</a>"</font>, GAMGList, pc_gamg->gamg_type_name, tname, <font color="#4169E1">sizeof</font>(tname), &flag));
<a name="line1819">1819: </a> <font color="#4169E1">if</font> (flag) <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCGAMGSetType.html">PCGAMGSetType</a>(pc, tname));
<a name="line1820">1820: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsBool.html">PetscOptionsBool</a>(<font color="#666666">"-pc_gamg_repartition"</font>, <font color="#666666">"Repartion coarse grids"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMGSetRepartition.html">PCGAMGSetRepartition</a>"</font>, pc_gamg->repart, &pc_gamg->repart, NULL));
<a name="line1821">1821: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsBool.html">PetscOptionsBool</a>(<font color="#666666">"-pc_gamg_use_sa_esteig"</font>, <font color="#666666">"Use eigen estimate from smoothed aggregation for smoother"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMGSetUseSAEstEig.html">PCGAMGSetUseSAEstEig</a>"</font>, pc_gamg->use_sa_esteig, &pc_gamg->use_sa_esteig, NULL));
<a name="line1822">1822: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsBool.html">PetscOptionsBool</a>(<font color="#666666">"-pc_gamg_recompute_esteig"</font>, <font color="#666666">"Set flag to recompute eigen estimates for Chebyshev when matrix changes"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMGSetRecomputeEstEig.html">PCGAMGSetRecomputeEstEig</a>"</font>, pc_gamg->recompute_esteig, &pc_gamg->recompute_esteig, NULL));
<a name="line1823">1823: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsBool.html">PetscOptionsBool</a>(<font color="#666666">"-pc_gamg_reuse_interpolation"</font>, <font color="#666666">"Reuse prolongation operator"</font>, <font color="#666666">"PCGAMGReuseInterpolation"</font>, pc_gamg->reuse_prol, &pc_gamg->reuse_prol, NULL));
<a name="line1824">1824: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsBool.html">PetscOptionsBool</a>(<font color="#666666">"-pc_gamg_asm_use_agg"</font>, <font color="#666666">"Use aggregation aggregates for ASM smoother"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMGASMSetUseAggs.html">PCGAMGASMSetUseAggs</a>"</font>, pc_gamg->use_aggs_in_asm, &pc_gamg->use_aggs_in_asm, NULL));
<a name="line1825">1825: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsBool.html">PetscOptionsBool</a>(<font color="#666666">"-pc_gamg_parallel_coarse_grid_solver"</font>, <font color="#666666">"Use parallel coarse grid solver (otherwise put last grid on one process)"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMGSetParallelCoarseGridSolve.html">PCGAMGSetParallelCoarseGridSolve</a>"</font>, pc_gamg->use_parallel_coarse_grid_solver, &pc_gamg->use_parallel_coarse_grid_solver, NULL));
<a name="line1826">1826: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsBool.html">PetscOptionsBool</a>(<font color="#666666">"-pc_gamg_cpu_pin_coarse_grids"</font>, <font color="#666666">"Pin coarse grids to the CPU"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMGSetCpuPinCoarseGrids.html">PCGAMGSetCpuPinCoarseGrids</a>"</font>, pc_gamg->cpu_pin_coarse_grids, &pc_gamg->cpu_pin_coarse_grids, NULL));
<a name="line1827">1827: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsEnum.html">PetscOptionsEnum</a>(<font color="#666666">"-pc_gamg_coarse_grid_layout_type"</font>, <font color="#666666">"compact: place reduced grids on processes in natural order; spread: distribute to whole machine for more memory bandwidth"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMGSetCoarseGridLayoutType.html">PCGAMGSetCoarseGridLayoutType</a>"</font>, LayoutTypes,
<a name="line1828">1828: </a> (<a href="../../../../../manualpages/Sys/PetscEnum.html">PetscEnum</a>)pc_gamg->layout_type, (<a href="../../../../../manualpages/Sys/PetscEnum.html">PetscEnum</a> *)&pc_gamg->layout_type, NULL));
<a name="line1829">1829: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsInt.html">PetscOptionsInt</a>(<font color="#666666">"-pc_gamg_process_eq_limit"</font>, <font color="#666666">"Limit (goal) on number of equations per process on coarse grids"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMGSetProcEqLim.html">PCGAMGSetProcEqLim</a>"</font>, pc_gamg->min_eq_proc, &pc_gamg->min_eq_proc, NULL));
<a name="line1830">1830: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsInt.html">PetscOptionsInt</a>(<font color="#666666">"-pc_gamg_coarse_eq_limit"</font>, <font color="#666666">"Limit on number of equations for the coarse grid"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMGSetCoarseEqLim.html">PCGAMGSetCoarseEqLim</a>"</font>, pc_gamg->coarse_eq_limit, &pc_gamg->coarse_eq_limit, NULL));
<a name="line1831">1831: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsInt.html">PetscOptionsInt</a>(<font color="#666666">"-pc_gamg_asm_hem_aggs"</font>, <font color="#666666">"Number of HEM matching passed in aggregates for ASM smoother"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMGASMSetHEM.html">PCGAMGASMSetHEM</a>"</font>, pc_gamg->asm_hem_aggs, &pc_gamg->asm_hem_aggs, NULL));
<a name="line1832">1832: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsReal.html">PetscOptionsReal</a>(<font color="#666666">"-pc_gamg_threshold_scale"</font>, <font color="#666666">"Scaling of threshold for each level not specified"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMGSetThresholdScale.html">PCGAMGSetThresholdScale</a>"</font>, pc_gamg->threshold_scale, &pc_gamg->threshold_scale, NULL));
<a name="line1833">1833: </a> n = PETSC_MG_MAXLEVELS;
<a name="line1834">1834: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsRealArray.html">PetscOptionsRealArray</a>(<font color="#666666">"-pc_gamg_threshold"</font>, <font color="#666666">"Relative threshold to use for dropping edges in aggregation graph"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMGSetThreshold.html">PCGAMGSetThreshold</a>"</font>, pc_gamg->threshold, &n, &flag));
<a name="line1835">1835: </a> <font color="#4169E1">if</font> (!flag || n < PETSC_MG_MAXLEVELS) {
<a name="line1836">1836: </a> <font color="#4169E1">if</font> (!flag) n = 1;
<a name="line1837">1837: </a> i = n;
<a name="line1838">1838: </a> <font color="#4169E1">do</font> {
<a name="line1839">1839: </a> pc_gamg->threshold[i] = pc_gamg->threshold[i - 1] * pc_gamg->threshold_scale;
<a name="line1840">1840: </a> } <font color="#4169E1">while</font> (++i < PETSC_MG_MAXLEVELS);
<a name="line1841">1841: </a> }
<a name="line1842">1842: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsInt.html">PetscOptionsInt</a>(<font color="#666666">"-pc_mg_levels"</font>, <font color="#666666">"Set number of MG levels (should get from base class)"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMGSetNlevels.html">PCGAMGSetNlevels</a>"</font>, pc_gamg->Nlevels, &pc_gamg->Nlevels, NULL));
<a name="line1843">1843: </a> <a href="../../../../../manualpages/Sys/PetscCheck.html">PetscCheck</a>(pc_gamg->Nlevels <= PETSC_MG_MAXLEVELS, <a href="../../../../../manualpages/Sys/PetscObjectComm.html">PetscObjectComm</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc), <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_ERR_ARG_INCOMP</a>, <font color="#666666">"-pc_mg_levels (%"</font> PetscInt_FMT <font color="#666666">") >= PETSC_MG_MAXLEVELS (%d)"</font>, pc_gamg->Nlevels, PETSC_MG_MAXLEVELS);
<a name="line1844">1844: </a> n = PETSC_MG_MAXLEVELS;
<a name="line1845">1845: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsIntArray.html">PetscOptionsIntArray</a>(<font color="#666666">"-pc_gamg_rank_reduction_factors"</font>, <font color="#666666">"Manual schedule of coarse grid reduction factors that overrides internal heuristics (0 for first reduction puts one process/device)"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMGSetRankReductionFactors.html">PCGAMGSetRankReductionFactors</a>"</font>, pc_gamg->level_reduction_factors, &n, &flag));
<a name="line1846">1846: </a> <font color="#4169E1">if</font> (!flag) i = 0;
<a name="line1847">1847: </a> <font color="#4169E1">else</font> i = n;
<a name="line1848">1848: </a> <font color="#4169E1">do</font> {
<a name="line1849">1849: </a> pc_gamg->level_reduction_factors[i] = -1;
<a name="line1850">1850: </a> } <font color="#4169E1">while</font> (++i < PETSC_MG_MAXLEVELS);
<a name="line1851">1851: </a> {
<a name="line1852">1852: </a> <a href="../../../../../manualpages/Sys/PetscReal.html">PetscReal</a> eminmax[2] = {0., 0.};
<a name="line1853">1853: </a> n = 2;
<a name="line1854">1854: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsRealArray.html">PetscOptionsRealArray</a>(<font color="#666666">"-pc_gamg_eigenvalues"</font>, <font color="#666666">"extreme eigenvalues for smoothed aggregation"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMGSetEigenvalues.html">PCGAMGSetEigenvalues</a>"</font>, eminmax, &n, &flag));
<a name="line1855">1855: </a> <font color="#4169E1">if</font> (flag) {
<a name="line1856">1856: </a> <a href="../../../../../manualpages/Sys/PetscCheck.html">PetscCheck</a>(n == 2, <a href="../../../../../manualpages/Sys/PetscObjectComm.html">PetscObjectComm</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc), <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_ERR_ARG_INCOMP</a>, <font color="#666666">"-pc_gamg_eigenvalues: must specify 2 parameters, min and max eigenvalues"</font>);
<a name="line1857">1857: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCGAMGSetEigenvalues.html">PCGAMGSetEigenvalues</a>(pc, eminmax[1], eminmax[0]));
<a name="line1858">1858: </a> }
<a name="line1859">1859: </a> }
<a name="line1860">1860: </a> pc_gamg->injection_index_size = MAT_COARSEN_STRENGTH_INDEX_SIZE;
<a name="line1861">1861: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscOptionsIntArray.html">PetscOptionsIntArray</a>(<font color="#666666">"-pc_gamg_injection_index"</font>, <font color="#666666">"Array of indices to use to use injection coarse grid space"</font>, <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMGSetInjectionIndex.html">PCGAMGSetInjectionIndex</a>"</font>, pc_gamg->injection_index, &pc_gamg->injection_index_size, NULL));
<a name="line1862">1862: </a> <font color="#B22222">/* set options for subtype */</font>
<a name="line1863">1863: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>((*pc_gamg->ops->setfromoptions)(pc, PetscOptionsObject));
<a name="line1865">1865: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCGetOptionsPrefix.html">PCGetOptionsPrefix</a>(pc, &pcpre));
<a name="line1866">1866: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscSNPrintf.html">PetscSNPrintf</a>(prefix, <font color="#4169E1">sizeof</font>(prefix), <font color="#666666">"%spc_gamg_"</font>, pcpre ? pcpre : <font color="#666666">""</font>));
<a name="line1867">1867: </a> <a href="../../../../../manualpages/Sys/PetscOptionsHeadEnd.html">PetscOptionsHeadEnd</a>();
<a name="line1868">1868: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1869">1869: </a>}
<a name="line1871">1871: </a><font color="#B22222">/*MC</font>
<a name="line1872">1872: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a> - Geometric algebraic multigrid (AMG) preconditioner</font>
<a name="line1874">1874: </a><font color="#B22222"> Options Database Keys:</font>
<a name="line1875">1875: </a><font color="#B22222">+ -pc_gamg_type <type,default=agg> - one of agg, geo, or classical (only smoothed aggregation, agg, supported)</font>
<a name="line1876">1876: </a><font color="#B22222">. -pc_gamg_repartition <bool,default=false> - repartition the degrees of freedom across the coarse grids as they are determined</font>
<a name="line1877">1877: </a><font color="#B22222">. -pc_gamg_asm_use_agg <bool,default=false> - use the aggregates from the coasening process to defined the subdomains on each level for the `<a href="../../../../../manualpages/PC/PCASM.html">PCASM</a>` smoother.</font>
<a name="line1878">1878: </a><font color="#B22222"> That is using `-mg_levels_pc_type asm`</font>
<a name="line1879">1879: </a><font color="#B22222">. -pc_gamg_process_eq_limit <limit, default=50> - `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>` will reduce the number of MPI ranks used directly on the coarse grids so that there are around <limit></font>
<a name="line1880">1880: </a><font color="#B22222"> equations on each process that has degrees of freedom</font>
<a name="line1881">1881: </a><font color="#B22222">. -pc_gamg_coarse_eq_limit <limit, default=50> - Set maximum number of equations on coarsest grid to aim for.</font>
<a name="line1882">1882: </a><font color="#B22222">. -pc_gamg_reuse_interpolation <bool,default=true> - when rebuilding the algebraic multigrid preconditioner reuse the previously computed interpolations (should always be true)</font>
<a name="line1883">1883: </a><font color="#B22222">. -pc_gamg_threshold[] <thresh,default=[-1,...]> - Before aggregating the graph `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>` will remove small values from the graph on each level (< 0 does no filtering)</font>
<a name="line1884">1884: </a><font color="#B22222">- -pc_gamg_threshold_scale <scale,default=1> - Scaling of threshold on each coarser grid if not specified</font>
<a name="line1886">1886: </a><font color="#B22222"> Options Database Keys for Aggregation:</font>
<a name="line1887">1887: </a><font color="#B22222">+ -pc_gamg_agg_nsmooths <nsmooth, default=1> - number of smoothing steps to use with smooth aggregation to construct prolongation</font>
<a name="line1888">1888: </a><font color="#B22222">. -pc_gamg_aggressive_coarsening <n,default=1> - number of aggressive coarsening (MIS-2) levels from finest.</font>
<a name="line1889">1889: </a><font color="#B22222">. -pc_gamg_aggressive_square_graph <bool,default=false> - Use square graph (A'A) or MIS-k (k=2) for aggressive coarsening</font>
<a name="line1890">1890: </a><font color="#B22222">. -pc_gamg_mis_k_minimum_degree_ordering <bool,default=true> - Use minimum degree ordering in greedy MIS algorithm</font>
<a name="line1891">1891: </a><font color="#B22222">. -pc_gamg_pc_gamg_asm_hem_aggs <n,default=0> - Number of HEM aggregation steps for `<a href="../../../../../manualpages/PC/PCASM.html">PCASM</a>` smoother</font>
<a name="line1892">1892: </a><font color="#B22222">- -pc_gamg_aggressive_mis_k <n,default=2> - Number (k) distance in MIS coarsening (>2 is 'aggressive')</font>
<a name="line1894">1894: </a><font color="#B22222"> Options Database Keys for Multigrid:</font>
<a name="line1895">1895: </a><font color="#B22222">+ -pc_mg_cycle_type <v> - v or w, see `<a href="../../../../../manualpages/PC/PCMGSetCycleType.html">PCMGSetCycleType</a>()`</font>
<a name="line1896">1896: </a><font color="#B22222">. -pc_mg_distinct_smoothup - configure the up and down (pre and post) smoothers separately, see <a href="../../../../../manualpages/PC/PCMGSetDistinctSmoothUp.html">PCMGSetDistinctSmoothUp</a>()</font>
<a name="line1897">1897: </a><font color="#B22222">. -pc_mg_type <multiplicative> - (one of) additive multiplicative full kascade</font>
<a name="line1898">1898: </a><font color="#B22222">- -pc_mg_levels <levels> - Number of levels of multigrid to use. GAMG has a heuristic so pc_mg_levels is not usually used with GAMG</font>
<a name="line1900">1900: </a><font color="#B22222"> Level: intermediate</font>
<a name="line1902">1902: </a><font color="#B22222"> Notes:</font>
<a name="line1903">1903: </a><font color="#B22222"> To obtain good performance for `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>` for vector valued problems you must</font>
<a name="line1904">1904: </a><font color="#B22222"> call `<a href="../../../../../manualpages/Mat/MatSetBlockSize.html">MatSetBlockSize</a>()` to indicate the number of degrees of freedom per grid point</font>
<a name="line1905">1905: </a><font color="#B22222"> call `<a href="../../../../../manualpages/Mat/MatSetNearNullSpace.html">MatSetNearNullSpace</a>()` (or `<a href="../../../../../manualpages/PC/PCSetCoordinates.html">PCSetCoordinates</a>()` if solving the equations of elasticity) to indicate the near null space of the operator</font>
<a name="line1907">1907: </a><font color="#B22222"> The many options for `<a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>` also work directly for `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>` such as controlling the smoothers on each level etc.</font>
<a name="line1909">1909: </a><font color="#B22222">.seealso: [the Users Manual section on <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>](sec_amg), [the Users Manual section on <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>](sec_mg), [](ch_ksp), `<a href="../../../../../manualpages/PC/PCCreate.html">PCCreate</a>()`, `<a href="../../../../../manualpages/PC/PCSetType.html">PCSetType</a>()`,</font>
<a name="line1910">1910: </a><font color="#B22222"> `<a href="../../../../../manualpages/Mat/MatSetBlockSize.html">MatSetBlockSize</a>()`,</font>
<a name="line1911">1911: </a><font color="#B22222"> `<a href="../../../../../manualpages/PC/PCMGType.html">PCMGType</a>`, `<a href="../../../../../manualpages/PC/PCSetCoordinates.html">PCSetCoordinates</a>()`, `<a href="../../../../../manualpages/Mat/MatSetNearNullSpace.html">MatSetNearNullSpace</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGSetType.html">PCGAMGSetType</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGAGG.html">PCGAMGAGG</a>`, `PCGAMGGEO`, `PCGAMGCLASSICAL`, `<a href="../../../../../manualpages/PC/PCGAMGSetProcEqLim.html">PCGAMGSetProcEqLim</a>()`,</font>
<a name="line1912">1912: </a><font color="#B22222"> `<a href="../../../../../manualpages/PC/PCGAMGSetCoarseEqLim.html">PCGAMGSetCoarseEqLim</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGSetRepartition.html">PCGAMGSetRepartition</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGRegister.html">PCGAMGRegister</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGSetReuseInterpolation.html">PCGAMGSetReuseInterpolation</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGASMSetUseAggs.html">PCGAMGASMSetUseAggs</a>()`,</font>
<a name="line1913">1913: </a><font color="#B22222"> `<a href="../../../../../manualpages/PC/PCGAMGSetParallelCoarseGridSolve.html">PCGAMGSetParallelCoarseGridSolve</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGSetNlevels.html">PCGAMGSetNlevels</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGSetThreshold.html">PCGAMGSetThreshold</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGGetType.html">PCGAMGGetType</a>()`, `<a href="../../../../../manualpages/PC/PCGAMGSetUseSAEstEig.html">PCGAMGSetUseSAEstEig</a>()`</font>
<a name="line1914">1914: </a><font color="#B22222">M*/</font>
<a name="line1915">1915: </a><strong><font color="#4169E1"><a name="PCCreate_GAMG"></a>PETSC_EXTERN <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> PCCreate_GAMG(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc)</font></strong>
<a name="line1916">1916: </a>{
<a name="line1917">1917: </a> PC_GAMG *pc_gamg;
<a name="line1918">1918: </a> PC_MG *mg;
<a name="line1920">1920: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line1921">1921: </a> <font color="#B22222">/* register AMG type */</font>
<a name="line1922">1922: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCGAMGInitializePackage.html">PCGAMGInitializePackage</a>());
<a name="line1924">1924: </a> <font color="#B22222">/* <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a> is an inherited class of <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>. Initialize pc as <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a> */</font>
<a name="line1925">1925: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCSetType.html">PCSetType</a>(pc, <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a>));
<a name="line1926">1926: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(PetscObjectChangeTypeName((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>));
<a name="line1928">1928: </a> <font color="#B22222">/* create a supporting struct and attach it to pc */</font>
<a name="line1929">1929: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscNew.html">PetscNew</a>(&pc_gamg));
<a name="line1930">1930: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCMGSetGalerkin.html">PCMGSetGalerkin</a>(pc, <a href="../../../../../manualpages/PC/PCMGalerkinType.html">PC_MG_GALERKIN_EXTERNAL</a>));
<a name="line1931">1931: </a> mg = (PC_MG *)pc->data;
<a name="line1932">1932: </a> mg->innerctx = pc_gamg;
<a name="line1934">1934: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscNew.html">PetscNew</a>(&pc_gamg->ops));
<a name="line1936">1936: </a> <font color="#B22222">/* these should be in subctx but repartitioning needs simple arrays */</font>
<a name="line1937">1937: </a> pc_gamg->data_sz = 0;
<a name="line1938">1938: </a> pc_gamg->data = NULL;
<a name="line1940">1940: </a> <font color="#B22222">/* overwrite the pointers of <a href="../../../../../manualpages/PC/PCMG.html">PCMG</a> by the functions of base class <a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a> */</font>
<a name="line1941">1941: </a> pc->ops->setfromoptions = PCSetFromOptions_GAMG;
<a name="line1942">1942: </a> pc->ops->setup = PCSetUp_GAMG;
<a name="line1943">1943: </a> pc->ops->reset = PCReset_GAMG;
<a name="line1944">1944: </a> pc->ops->destroy = PCDestroy_GAMG;
<a name="line1945">1945: </a> mg->view = PCView_GAMG;
<a name="line1947">1947: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetProcEqLim_C"</font>, PCGAMGSetProcEqLim_GAMG));
<a name="line1948">1948: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetCoarseEqLim_C"</font>, PCGAMGSetCoarseEqLim_GAMG));
<a name="line1949">1949: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetRepartition_C"</font>, PCGAMGSetRepartition_GAMG));
<a name="line1950">1950: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetEigenvalues_C"</font>, PCGAMGSetEigenvalues_GAMG));
<a name="line1951">1951: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetUseSAEstEig_C"</font>, PCGAMGSetUseSAEstEig_GAMG));
<a name="line1952">1952: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetRecomputeEstEig_C"</font>, PCGAMGSetRecomputeEstEig_GAMG));
<a name="line1953">1953: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetReuseInterpolation_C"</font>, PCGAMGSetReuseInterpolation_GAMG));
<a name="line1954">1954: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGASMSetUseAggs_C"</font>, PCGAMGASMSetUseAggs_GAMG));
<a name="line1955">1955: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetParallelCoarseGridSolve_C"</font>, PCGAMGSetParallelCoarseGridSolve_GAMG));
<a name="line1956">1956: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetCpuPinCoarseGrids_C"</font>, PCGAMGSetCpuPinCoarseGrids_GAMG));
<a name="line1957">1957: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetCoarseGridLayoutType_C"</font>, PCGAMGSetCoarseGridLayoutType_GAMG));
<a name="line1958">1958: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetThreshold_C"</font>, PCGAMGSetThreshold_GAMG));
<a name="line1959">1959: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetRankReductionFactors_C"</font>, PCGAMGSetRankReductionFactors_GAMG));
<a name="line1960">1960: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetThresholdScale_C"</font>, PCGAMGSetThresholdScale_GAMG));
<a name="line1961">1961: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetType_C"</font>, PCGAMGSetType_GAMG));
<a name="line1962">1962: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGGetType_C"</font>, PCGAMGGetType_GAMG));
<a name="line1963">1963: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetNlevels_C"</font>, PCGAMGSetNlevels_GAMG));
<a name="line1964">1964: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGASMSetHEM_C"</font>, PCGAMGASMSetHEM_GAMG));
<a name="line1965">1965: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscObjectComposeFunction.html">PetscObjectComposeFunction</a>((<a href="../../../../../manualpages/Sys/PetscObject.html">PetscObject</a>)pc, <font color="#666666">"PCGAMGSetInjectionIndex_C"</font>, PCGAMGSetInjectionIndex_GAMG));
<a name="line1966">1966: </a> pc_gamg->repart = <a href="../../../../../manualpages/Sys/PETSC_FALSE.html">PETSC_FALSE</a>;
<a name="line1967">1967: </a> pc_gamg->reuse_prol = <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>;
<a name="line1968">1968: </a> pc_gamg->use_aggs_in_asm = <a href="../../../../../manualpages/Sys/PETSC_FALSE.html">PETSC_FALSE</a>;
<a name="line1969">1969: </a> pc_gamg->use_parallel_coarse_grid_solver = <a href="../../../../../manualpages/Sys/PETSC_FALSE.html">PETSC_FALSE</a>;
<a name="line1970">1970: </a> pc_gamg->cpu_pin_coarse_grids = <a href="../../../../../manualpages/Sys/PETSC_FALSE.html">PETSC_FALSE</a>;
<a name="line1971">1971: </a> pc_gamg->layout_type = <a href="../../../../../manualpages/PC/PCGAMGLayoutType.html">PCGAMG_LAYOUT_SPREAD</a>;
<a name="line1972">1972: </a> pc_gamg->min_eq_proc = 50;
<a name="line1973">1973: </a> pc_gamg->asm_hem_aggs = 0;
<a name="line1974">1974: </a> pc_gamg->coarse_eq_limit = 50;
<a name="line1975">1975: </a> <font color="#4169E1">for</font> (int i = 0; i < PETSC_MG_MAXLEVELS; i++) pc_gamg->threshold[i] = -1;
<a name="line1976">1976: </a> pc_gamg->threshold_scale = 1.;
<a name="line1977">1977: </a> pc_gamg->Nlevels = PETSC_MG_MAXLEVELS;
<a name="line1978">1978: </a> pc_gamg->current_level = 0; <font color="#B22222">/* don't need to init really */</font>
<a name="line1979">1979: </a> pc_gamg->use_sa_esteig = <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>;
<a name="line1980">1980: </a> pc_gamg->recompute_esteig = <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>;
<a name="line1981">1981: </a> pc_gamg->emin = 0;
<a name="line1982">1982: </a> pc_gamg->emax = 0;
<a name="line1984">1984: </a> pc_gamg->ops->createlevel = PCGAMGCreateLevel_GAMG;
<a name="line1986">1986: </a> <font color="#B22222">/* PCSetUp_GAMG assumes that the type has been set, so set it to the default now */</font>
<a name="line1987">1987: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCGAMGSetType.html">PCGAMGSetType</a>(pc, <a href="../../../../../manualpages/PC/PCGAMGAGG.html">PCGAMGAGG</a>));
<a name="line1988">1988: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line1989">1989: </a>}
<a name="line1991">1991: </a><font color="#B22222">/*@C</font>
<a name="line1992">1992: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGInitializePackage.html">PCGAMGInitializePackage</a> - This function initializes everything in the `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>` package. It is called</font>
<a name="line1993">1993: </a><font color="#B22222"> from `<a href="../../../../../manualpages/KSP/PCInitializePackage.html">PCInitializePackage</a>()`.</font>
<a name="line1995">1995: </a><font color="#B22222"> Level: developer</font>
<a name="line1997">1997: </a><font color="#B22222">.seealso: [](ch_ksp), `<a href="../../../../../manualpages/Sys/PetscInitialize.html">PetscInitialize</a>()`</font>
<a name="line1998">1998: </a><font color="#B22222">@*/</font>
<a name="line1999">1999: </a><strong><font color="#4169E1"><a name="PCGAMGInitializePackage"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGInitializePackage.html">PCGAMGInitializePackage</a>(void)</font></strong>
<a name="line2000">2000: </a>{
<a name="line2001">2001: </a> <a href="../../../../../manualpages/Sys/PetscInt.html">PetscInt</a> l;
<a name="line2003">2003: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line2004">2004: </a> <font color="#4169E1">if</font> (PCGAMGPackageInitialized) <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line2005">2005: </a> PCGAMGPackageInitialized = <a href="../../../../../manualpages/Sys/PETSC_TRUE.html">PETSC_TRUE</a>;
<a name="line2006">2006: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFunctionListAdd.html">PetscFunctionListAdd</a>(&GAMGList, PCGAMGGEO, PCCreateGAMG_GEO));
<a name="line2007">2007: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFunctionListAdd.html">PetscFunctionListAdd</a>(&GAMGList, <a href="../../../../../manualpages/PC/PCGAMGAGG.html">PCGAMGAGG</a>, PCCreateGAMG_AGG));
<a name="line2008">2008: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFunctionListAdd.html">PetscFunctionListAdd</a>(&GAMGList, PCGAMGCLASSICAL, PCCreateGAMG_Classical));
<a name="line2009">2009: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscRegisterFinalize.html">PetscRegisterFinalize</a>(<a href="../../../../../manualpages/PC/PCGAMGFinalizePackage.html">PCGAMGFinalizePackage</a>));
<a name="line2011">2011: </a> <font color="#B22222">/* general events */</font>
<a name="line2012">2012: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(<font color="#666666">"PCSetUp_GAMG+"</font>, PC_CLASSID, &petsc_gamg_setup_events[GAMG_SETUP]));
<a name="line2013">2013: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(<font color="#666666">" PCGAMGCreateG"</font>, PC_CLASSID, &petsc_gamg_setup_events[GAMG_GRAPH]));
<a name="line2014">2014: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(<font color="#666666">" GAMG Coarsen"</font>, PC_CLASSID, &petsc_gamg_setup_events[GAMG_COARSEN]));
<a name="line2015">2015: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(<font color="#666666">" GAMG MIS/Agg"</font>, PC_CLASSID, &petsc_gamg_setup_events[GAMG_MIS]));
<a name="line2016">2016: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(<font color="#666666">" PCGAMGProl"</font>, PC_CLASSID, &petsc_gamg_setup_events[GAMG_PROL]));
<a name="line2017">2017: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(<font color="#666666">" GAMG Prol-col"</font>, PC_CLASSID, &petsc_gamg_setup_events[GAMG_PROLA]));
<a name="line2018">2018: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(<font color="#666666">" GAMG Prol-lift"</font>, PC_CLASSID, &petsc_gamg_setup_events[GAMG_PROLB]));
<a name="line2019">2019: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(<font color="#666666">" PCGAMGOptProl"</font>, PC_CLASSID, &petsc_gamg_setup_events[GAMG_OPT]));
<a name="line2020">2020: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(<font color="#666666">" GAMG smooth"</font>, PC_CLASSID, &petsc_gamg_setup_events[GAMG_OPTSM]));
<a name="line2021">2021: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(<font color="#666666">" PCGAMGCreateL"</font>, PC_CLASSID, &petsc_gamg_setup_events[GAMG_LEVEL]));
<a name="line2022">2022: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(<font color="#666666">" GAMG PtAP"</font>, PC_CLASSID, &petsc_gamg_setup_events[GAMG_PTAP]));
<a name="line2023">2023: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(<font color="#666666">" GAMG Reduce"</font>, PC_CLASSID, &petsc_gamg_setup_events[GAMG_REDUCE]));
<a name="line2024">2024: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(<font color="#666666">" GAMG Repart"</font>, PC_CLASSID, &petsc_gamg_setup_events[GAMG_REPART]));
<a name="line2025">2025: </a> <font color="#B22222">/* <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(" GAMG Inv-Srt", PC_CLASSID, &petsc_gamg_setup_events[SET13])); */</font>
<a name="line2026">2026: </a> <font color="#B22222">/* <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(" GAMG Move A", PC_CLASSID, &petsc_gamg_setup_events[SET14])); */</font>
<a name="line2027">2027: </a> <font color="#B22222">/* <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(" GAMG Move P", PC_CLASSID, &petsc_gamg_setup_events[SET15])); */</font>
<a name="line2028">2028: </a> <font color="#4169E1">for</font> (l = 0; l < PETSC_MG_MAXLEVELS; l++) {
<a name="line2029">2029: </a> char ename[32];
<a name="line2031">2031: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscSNPrintf.html">PetscSNPrintf</a>(ename, <font color="#4169E1">sizeof</font>(ename), <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a> Squ l%02"</font> PetscInt_FMT, l));
<a name="line2032">2032: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(ename, PC_CLASSID, &petsc_gamg_setup_matmat_events[l][0]));
<a name="line2033">2033: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscSNPrintf.html">PetscSNPrintf</a>(ename, <font color="#4169E1">sizeof</font>(ename), <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a> Gal l%02"</font> PetscInt_FMT, l));
<a name="line2034">2034: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(ename, PC_CLASSID, &petsc_gamg_setup_matmat_events[l][1]));
<a name="line2035">2035: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscSNPrintf.html">PetscSNPrintf</a>(ename, <font color="#4169E1">sizeof</font>(ename), <font color="#666666">"<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a> Opt l%02"</font> PetscInt_FMT, l));
<a name="line2036">2036: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogEventRegister.html">PetscLogEventRegister</a>(ename, PC_CLASSID, &petsc_gamg_setup_matmat_events[l][2]));
<a name="line2037">2037: </a> }
<a name="line2038">2038: </a><font color="#A020F0">#if defined(GAMG_STAGES)</font>
<a name="line2039">2039: </a> { <font color="#B22222">/* create timer stages */</font>
<a name="line2040">2040: </a> char str[32];
<a name="line2041">2041: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscSNPrintf.html">PetscSNPrintf</a>(str, <a href="../../../../../manualpages/Sys/PETSC_STATIC_ARRAY_LENGTH.html">PETSC_STATIC_ARRAY_LENGTH</a>(str), <font color="#666666">"GAMG Level %d"</font>, 0));
<a name="line2042">2042: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Log/PetscLogStageRegister.html">PetscLogStageRegister</a>(str, &gamg_stages[0]));
<a name="line2043">2043: </a> }
<a name="line2044">2044: </a><font color="#A020F0">#endif</font>
<a name="line2045">2045: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line2046">2046: </a>}
<a name="line2048">2048: </a><font color="#B22222">/*@C</font>
<a name="line2049">2049: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGFinalizePackage.html">PCGAMGFinalizePackage</a> - This function frees everything from the `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>` package. It is</font>
<a name="line2050">2050: </a><font color="#B22222"> called from `<a href="../../../../../manualpages/Sys/PetscFinalize.html">PetscFinalize</a>()` automatically.</font>
<a name="line2052">2052: </a><font color="#B22222"> Level: developer</font>
<a name="line2054">2054: </a><font color="#B22222">.seealso: [](ch_ksp), `<a href="../../../../../manualpages/Sys/PetscFinalize.html">PetscFinalize</a>()`</font>
<a name="line2055">2055: </a><font color="#B22222">@*/</font>
<a name="line2056">2056: </a><strong><font color="#4169E1"><a name="PCGAMGFinalizePackage"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGFinalizePackage.html">PCGAMGFinalizePackage</a>(void)</font></strong>
<a name="line2057">2057: </a>{
<a name="line2058">2058: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line2059">2059: </a> PCGAMGPackageInitialized = <a href="../../../../../manualpages/Sys/PETSC_FALSE.html">PETSC_FALSE</a>;
<a name="line2060">2060: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFunctionListDestroy.html">PetscFunctionListDestroy</a>(&GAMGList));
<a name="line2061">2061: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line2062">2062: </a>}
<a name="line2064">2064: </a><font color="#B22222">/*@C</font>
<a name="line2065">2065: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGRegister.html">PCGAMGRegister</a> - Register a `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>` implementation.</font>
<a name="line2067">2067: </a><font color="#B22222"> Input Parameters:</font>
<a name="line2068">2068: </a><font color="#B22222">+ type - string that will be used as the name of the `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>` type.</font>
<a name="line2069">2069: </a><font color="#B22222">- create - function for creating the gamg context.</font>
<a name="line2071">2071: </a><font color="#B22222"> Level: developer</font>
<a name="line2073">2073: </a><font color="#B22222">.seealso: [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMGType.html">PCGAMGType</a>`, `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`, `<a href="../../../../../manualpages/PC/PCGAMGSetType.html">PCGAMGSetType</a>()`</font>
<a name="line2074">2074: </a><font color="#B22222">@*/</font>
<a name="line2075">2075: </a><strong><font color="#4169E1"><a name="PCGAMGRegister"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGRegister.html">PCGAMGRegister</a>(<a href="../../../../../manualpages/PC/PCGAMGType.html">PCGAMGType</a> type, <a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> (*create)(<a href="../../../../../manualpages/PC/PC.html">PC</a>))</font></strong>
<a name="line2076">2076: </a>{
<a name="line2077">2077: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line2078">2078: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/PC/PCGAMGInitializePackage.html">PCGAMGInitializePackage</a>());
<a name="line2079">2079: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(<a href="../../../../../manualpages/Sys/PetscFunctionListAdd.html">PetscFunctionListAdd</a>(&GAMGList, type, create));
<a name="line2080">2080: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line2081">2081: </a>}
<a name="line2083">2083: </a><font color="#B22222">/*@</font>
<a name="line2084">2084: </a><font color="#B22222"> <a href="../../../../../manualpages/PC/PCGAMGCreateGraph.html">PCGAMGCreateGraph</a> - Creates a graph that is used by the ``<a href="../../../../../manualpages/PC/PCGAMGType.html">PCGAMGType</a>`` in the coarsening process</font>
<a name="line2086">2086: </a><font color="#B22222"> Input Parameters:</font>
<a name="line2087">2087: </a><font color="#B22222">+ pc - the `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`</font>
<a name="line2088">2088: </a><font color="#B22222">- A - the matrix, for any level</font>
<a name="line2090">2090: </a><font color="#B22222"> Output Parameter:</font>
<a name="line2091">2091: </a><font color="#B22222">. G - the graph</font>
<a name="line2093">2093: </a><font color="#B22222"> Level: advanced</font>
<a name="line2095">2095: </a><font color="#B22222">.seealso: [](ch_ksp), `<a href="../../../../../manualpages/PC/PCGAMGType.html">PCGAMGType</a>`, `<a href="../../../../../manualpages/PC/PCGAMG.html">PCGAMG</a>`, `<a href="../../../../../manualpages/PC/PCGAMGSetType.html">PCGAMGSetType</a>()`</font>
<a name="line2096">2096: </a><font color="#B22222">@*/</font>
<a name="line2097">2097: </a><strong><font color="#4169E1"><a name="PCGAMGCreateGraph"></a><a href="../../../../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a> <a href="../../../../../manualpages/PC/PCGAMGCreateGraph.html">PCGAMGCreateGraph</a>(<a href="../../../../../manualpages/PC/PC.html">PC</a> pc, <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> A, <a href="../../../../../manualpages/Mat/Mat.html">Mat</a> *G)</font></strong>
<a name="line2098">2098: </a>{
<a name="line2099">2099: </a> PC_MG *mg = (PC_MG *)pc->data;
<a name="line2100">2100: </a> PC_GAMG *pc_gamg = (PC_GAMG *)mg->innerctx;
<a name="line2102">2102: </a> <a href="../../../../../manualpages/Sys/PetscFunctionBegin.html">PetscFunctionBegin</a>;
<a name="line2103">2103: </a> <a href="../../../../../manualpages/Sys/PetscCall.html">PetscCall</a>(pc_gamg->ops->creategraph(pc, A, G));
<a name="line2104">2104: </a> <a href="../../../../../manualpages/Sys/PetscFunctionReturn.html">PetscFunctionReturn</a>(<a href="../../../../../manualpages/Sys/PetscErrorCode.html">PETSC_SUCCESS</a>);
<a name="line2105">2105: </a>}
</pre>
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