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<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.22/docs"> 3.22</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.21/docs"> 3.21</a></li>
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<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.18/docs"> 3.18</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.17/docs"> 3.17</a></li>
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<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.15/docs"> 3.15</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.14/docs"> 3.14</a></li>
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<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.6/docs"> 3.6</a></li>
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<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.3/docs"> 3.3</a></li>
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<section class="tex2jax_ignore mathjax_ignore" id="changes-3-12">
<h1>Changes: 3.12<a class="headerlink" href="#changes-3-12" title="Link to this heading">#</a></h1>
<p class="rubric">General:</p>
<ul class="simple">
<li><p>PetscRoundReal() has been removed, since the math routine round()
is not supported on all systems: perhaps use PetscCeilReal() or
PetscFloorReal()<li></p></li>
<li><p>The legacy and CMake compile systems (make all-legacy and
all-cmake) are removed</p></li>
<li><p>make gnumake is now make libs</p></li>
<li><p>PetscArraycmp() should be used instead of PetscMemcmp(), it takes
a count argument instead of a byte argument</p></li>
<li><p>PetscArraycpy() should be used instead of PetscMemcpy(), it takes
a count argument instead of a byte argument</p></li>
<li><p>PetscArrayzero() should be used instead of PetscMemzero(), it
takes a count argument instead of a byte argument</p></li>
<li><p>PetscArraymove() should be used instead of PetscMemmove(), it
takes a count argument instead of a byte argument</p></li>
<li><p>The ./configure options -with-gnu-compilers and
-with-vendor-compilers are removed</p></li>
<li><p>The ./configure option –with-avx512-kernels defaults to true now
so the manually optimized AVX-512 kernels are used by default</p></li>
<li><p>The order ./configure tests compilers has changed so there may be
a different compiler selected if you do not provide them</p></li>
<li><p>Added –with-64-bit-blas-indices that will switch to 64-bit
indices when using MKL libraries for BLAS/LAPACK and build
OpenBLAS with this support</p></li>
<li><p>Changed PETSC_DEPRECATED() to PETSC_DEPRECATED_FUNCTION() and
PETSC_DEPRECATED_TYPEDEF() to match naming of
PETSC_DEPRECATED_ENUM() and PETSC_DEPRECATED_MACRO</p></li>
<li><p>-help now causes the printing of the current value and the newly
set value for PetscOptionsInt(), etc</p></li>
<li><p>PetscFunctionListPrintTypes() takes an additional final argument
after the current value, the set value</p></li>
<li><p>PetscCalloc*() now calls the system calloc() routine instead of
malloc() plus memzero()</p></li>
<li><p>-malloc is now marked as deprecated, use -malloc_debug instead</p></li>
<li><p>-malloc_log and -malloc_log_threshold are now -malloc_view and
-malloc_view_threshold</p></li>
<li><p>PetscMallocDebug() is now PetscMallocSetDebug()</p></li>
<li><p>PetscMallocDumpLog() is now PetscMallocView(), see also
PetscMallocViewSet()</p></li>
<li><p>PetscMallocSetDumpLogThreshold() and PetscMallocSetDumpLog() are
now PetscMallocViewSet()</p></li>
<li><p>With -malloc_test or -malloc_debug allocated memory is initialized
with NaN to detect use of uninitialized numerical arrays</p></li>
<li><p>PetscMallocSet() now takes three arguments instead of two</p></li>
<li><p>Moved PetscCUBLASGetHandle() to a separate header file
petscublas.h</p></li>
<li><p>Moved VecCUDA*-routines from petsccuda.h into petscvec.h. Removed
petsccuda.h</p></li>
</ul>
<p class="rubric">Configure/Build:</p>
<ul class="simple">
<li><p>C++ dialect is now auto-detected (C++14 first and then C++11). One
can disable this check using –with-cxx-dialect=0, or force it to
only check for C++11 using –with-cxx-dialect=C++11</p></li>
<li><p>New option –download-hpddm to enable PCHPDDM and KSPHPDDM</p></li>
</ul>
<p class="rubric">IS:</p>
<p class="rubric">PetscDraw:</p>
<p class="rubric">PF:</p>
<p class="rubric">Vec:</p>
<ul class="simple">
<li><p>VecCUDAGet/RestoreArrayReadWrite() changed to
VecCUDAGet/RestoreArray()</p></li>
<li><p>VecViennaCLGet/RestoreArrayReadWrite() changed to
VecViennaCLGet/RestoreArray()</p></li>
<li><p>Added VecGet/RestoreArray/ReadInPlace() to get array of a vector
where it is without copying from GPU to CPU.</p></li>
</ul>
<p class="rubric">PetscLayout:</p>
<ul class="simple">
<li><p>Added PetscLayoutCreateFromSizes()</p></li>
<li><p>Added PetscLayoutCreateFromRanges()</p></li>
<li><p>Calling PetscLayoutSetUp() twice with different sizes is now
forbidden</p></li>
</ul>
<p class="rubric">PetscSection:</p>
<p class="rubric">VecScatter & PetscSF:</p>
<ul class="simple">
<li><p>The default VecScatter implementation is changed to PetscSF. In
other words, the default VecScatter shares PetscSF’s MPI
communication code. One can use -vecscatter_type mpi1 to go back
to the old implementation.</p></li>
<li><p>Added new InsertMode MAX_VALUES and MIN_VALUES support in
VecScatterBegin/End and VecGhostUpdateBegin/End.</p></li>
<li><p>PetscSFComputeMultiRootOriginalNumbering: add output argument with
the number of multiroots for convenience</p></li>
<li><p>Added an enum type PetscSFPattern for SF graph patterns. Valid
values include PETSCSF_PATTERN_ALLGATHER, PETSCSF_PATTERN_GATHER
and PETSCSF_PATTERN_ALLTOALL.</p></li>
<li><p>Added PetscSFSetGraphWithPattern() to set SF graphs with
predefined patterns.</p></li>
<li><p>Added PetscSFComposeInverse() to compose a new SF by putting the
inverse of an SF under the another SF.</p></li>
<li><p>Added MPI-3.0 neighborhood collectives support. One can use
command line option -sf_type neighbor to let SF use MPI-3.0
neighborhood collectives for communication instead of the default
MPI_Send/Recv.</p></li>
<li><p>PetscSF is now CUDA-aware. The rootdata, leafdata arguments passed
to SF routines can be either GPU pointers or CPU pointers. Use a
CUDA-aware MPI and option -use_gpu_aware_mpi to enable it.</p></li>
<li><p>VecScatter is also CUDA-aware. You can do VecScatter on CUDA
vectors without copying them from GPU to CPU. Again, you need a
CUDA-aware MPI and option -use_gpu_aware_mpi.</p></li>
<li><p>Removed PetscSFCreateFromZero. Instead, users should use
PetscSFCreate() to create an SF, and then set its graph with
PetscSFSetGraphWithPattern(..,PETSCSF_PATTERN_GATHER).</p></li>
<li><p>Renamed PetscSFGetRanks() to PetscSFGetRootRanks().</p></li>
</ul>
<p class="rubric">Mat:</p>
<ul class="simple">
<li><p>MatShift(Mat,0); will no longer silently insure there are no
missing diagonal entries. (Previously it would put 0 into any
diagonal entry that was missing)</p></li>
<li><p>Renamed MatComputeExplicitOperator() into MatComputeOperator() and
MatComputeExplicitOperatorTranspose() into
MatComputeOperatorTranspose(). Added extra argument to select the
desired matrix type</p></li>
<li><p>MatLoad() now supports loading dense matrices from HDF5/MAT files.</p></li>
<li><p>Added new Mat type, MATKAIJ, for matrices that can be expressed in
a particular Kronecker (tensor) product form.</p></li>
<li><p>Added MatCompositeSetScalings() to set separate scaling factors
for component matrices.</p></li>
<li><p>Added a Boolean option -mat_composite_merge_mvctx to merge Mvctx
of component matrices to optimize communication in MatMult() for
ADDITIVE matrices. Default is true.</p></li>
<li><p>Added MATSEQDENSECUDA class to use GPUs for dense linear algebra.</p></li>
</ul>
<p class="rubric">PC:</p>
<ul class="simple">
<li><p>Renamed PCComputeExplicitOperator() into PCComputeOperator().
Added extra argument to select the desired matrix type</p></li>
<li><p>Added support for PCCHOLESKY with MATSOLVERMUMPS and SBAIJ
matrices with bs greater than 1</p></li>
<li><p>Added support for PCLU with MATSOLVERMKL_PARDISO (resp.
MATSOLVERMKL_CPARDISO) and SEQBAIJ (resp. MPIBAIJ) matrices</p></li>
<li><p>Added support for PCCHOLESKY with MATSOLVERMKL_PARDISO (resp.
MATSOLVERMKL_CPARDISO) and SEQSBAIJ (resp. MPISBAIJ) matrices</p></li>
<li><p>Added new preconditioner PCHPDDM, cf.
src/ksp/ksp/examples/tutorials/ex71.c or
src/snes/examples/tutorials/ex56.c</p></li>
</ul>
<p class="rubric">KSP:</p>
<ul class="simple">
<li><p>Renamed KSPComputeExplicitOperator() into KSPComputeOperator().
Added extra argument to select the desired matrix type</p></li>
<li><p>KSPCGGLTRGetMinEig(KSP,PetscReal*) ->
KSPGLTRGetMinEig(KSP,PetscReal*)</p></li>
<li><p>KSPCGGLTRGetLambda(KSP,PetscReal*) ->
KSPGLTRGetLambda(KSP,PetscReal*)</p></li>
<li><p>KSPCGNASH, KSPCGSTCG, KSPCGGLTR -> KSPNASH, KSPSTCG, KSPGLTR</p></li>
<li><p>Added new Krylov solver KSPHPDDM, cf.
src/ksp/ksp/examples/tutorials/ex75.c or
src/ksp/ksp/examples/tutorials/ex9.c</p></li>
</ul>
<p class="rubric">SNES:</p>
<ul class="simple">
<li><p>Changed SNES_CONVERGED_TR_DELTA to SNES_DIVERGED_TR_DELTA with a
negative value to indicate diverged, unclear why it was ever
positive since tiny trust region would indicate trouble, not
converged</p></li>
</ul>
<p class="rubric">SNES:</p>
<ul class="simple">
<li><p>-snes_mf no longer turns the preconditioner to none; to use it
generally you will also need -pc_type none</p></li>
</ul>
<p class="rubric">SNESLineSearch:</p>
<p class="rubric">TS:</p>
<ul class="simple">
<li><p>Added tangent linear models for Runge-Kutta methods</p></li>
<li><p>Added second-order adjoint solvers based on Runge-Kutta methods
and Theta methods</p></li>
<li><p>Improved the usage of first-order adjoint solvers in an
optimization context. (The TS object can be reused in the
optimization loop)</p></li>
<li><p>Changed the APIs for integrand evaluations and corresponding
derivative evaluations. TSSetCostIntegrand() is deprecated.
(Instead a quadrature TS is used to handle the callbacks)</p></li>
<li><p>TSTrajectory creates a unique name for folders that store the
checkpoint data. Users can rerun adjoint codes without worrying
about the folder names, and run multiple codes under the same
directory.</p></li>
<li><p>Added support for using finite-differencing (and coloring) to
approximate the Jacobians needed by the adjoint solvers.
-snes_fd_color can be used for both implicit and explicit methods.</p></li>
</ul>
<p class="rubric">DM/DA:</p>
<ul class="simple">
<li><p>Add DMGetLocalSection() to be used in preference to
DMGetSection().</p></li>
<li><p>Add DMSetLocalSection() to be used in preference to
DMSetSection().</p></li>
<li><p>DMGetDefaultSF() replaced with DMGetSectionSF().</p></li>
<li><p>DMSetDefaultSF() replaced with DMSetSectionSF().</p></li>
<li><p>DMCreateDefaultSF() replaced with DMCreateSectionSF().</p></li>
<li><p>DMAddLabel() now increments the reference count of the DMLabel.</p></li>
<li><p>DMRemoveLabel() now destroys the DMLabel if the output argument is
NULL.</p></li>
<li><p>Add DMRemoveLabelBySelf() which looks up the DMLabel by itself,
removes from DM and destroys.</p></li>
</ul>
<p class="rubric">DMPlex:</p>
<ul class="simple">
<li><p>Rename DMPlexCreateSpectralClosurePermutation() to
DMPlexSetClosurePermutationTensor()</p></li>
<li><p>Add DMPlexFindVertices() for vertex coordinates -> DAG point
lookup</p></li>
<li><p>Add DMPlexGetOverlap() to get the partition overlap</p></li>
</ul>
<p class="rubric">DMNetwork:</p>
<ul class="simple">
<li><p>Changed prototypes for DMNetworkSetSizes()</p></li>
</ul>
<p class="rubric">PetscViewer:</p>
<ul class="simple">
<li><p>Removed PetscViewerHDF5{Get,Set}AIJNames() which are likely not
really needed</p></li>
<li><p>PetscViewerHDF5SetCollective() and -viewer_hdf5_collective can be
used to switch between independent and collective transfer mode.
Defaults now to false (independent).</p></li>
</ul>
<p class="rubric">SYS:</p>
<ul class="simple">
<li><p>Added PetscCheckDupsInt() to check if a PetscInt array has dups.</p></li>
<li><p>Added an argument to PetscBinaryRead() and
PetscBinarySynchronizedRead() to return the number of items read.</p></li>
</ul>
<p class="rubric">AO:</p>
<p class="rubric">Sieve:</p>
<p class="rubric">Fortran:</p>
</section>
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