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<li class="toctree-l1"><a class="reference internal" href="../overview/linear_solve_table.html">Summary of Sparse Linear Solvers Available In PETSc</a></li>
<li class="toctree-l1"><a class="reference internal" href="../overview/nonlinear_solve_table.html">Summary of Nonlinear Solvers Available In PETSc</a></li>
<li class="toctree-l1"><a class="reference internal" href="../overview/integrator_table.html">Summary of Time Integrators Available In PETSc</a></li>
<li class="toctree-l1"><a class="reference internal" href="../overview/tao_solve_table.html">Summary of Tao Solvers</a></li>
<li class="toctree-l1"><a class="reference internal" href="../overview/discrete_table.html">Summary of Discretization Management Systems</a></li>
<li class="toctree-l1"><a class="reference internal" href="../overview/plex_transform_table.html">Summary of Unstructured Mesh Transformations</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../manual/ksp.html">KSP: Linear System Solvers</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../manual/tao.html">TAO: Optimization Solvers</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../manual/dmbase.html">DM Basics</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/section.html">PetscSection: Connecting Grids to Data</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/dmplex.html">DMPlex: Unstructured Grids</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/dmstag.html">DMSTAG: Staggered, Structured Grid</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/dmnetwork.html">Networks</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/dt.html">PetscDT: Discretization Technology in PETSc</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../manual/versionchecking.html">Checking the PETSc version</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/matlab.html">Using MATLAB with PETSc</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/profiling.html">Profiling</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../manualpages/SPACE/index.html">Function Spaces (PetscSpace)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DUALSPACE/index.html">Dual Spaces (PetscDualSpace)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/FE/index.html">Finite Elements (PetscFE)</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../manualpages/PetscH/index.html">Hash Tables</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../manualpages/Bag/index.html">Bag</a></li>
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<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.22/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>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.20/docs"> 3.20</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.19/docs"> 3.19</a></li>
<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>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.16/docs"> 3.16</a></li>
<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>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.13/docs"> 3.13</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.12/docs"> 3.12</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.11/docs"> 3.11</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.10/docs"> 3.10</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.9/docs"> 3.9</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.8/docs"> 3.8</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.7/docs"> 3.7</a></li>
<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>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.5/docs"> 3.5</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.4/docs"> 3.4</a></li>
<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-3-15">
<h1>Changes: 3.15<a class="headerlink" href="#changes-3-15" title="Link to this heading">#</a></h1>
<p class="rubric">General:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre">PetscKokkosInitializeCheck()</span></code>, which initializes Kokkos if it
is not yet initialized</p></li>
<li><p>Add support for <code class="docutils notranslate"><span class="pre">-debug_terminal</span></code> Terminal to use Apple’s Terminal
instead of xterm, allowing use of cut-paste</p></li>
<li><p>Make Terminal the default device to display the debugger on Apple
instead of xterm</p></li>
<li><p>Add PetscHasExternalPackage() determining whether PETSc has been
configured with the given external package such as “hdf5”</p></li>
</ul>
<p class="rubric">Configure/Build:</p>
<ul class="simple">
<li><p>On macOS, <code class="docutils notranslate"><span class="pre">MACOS_FIREWALL=1</span></code> or <code class="docutils notranslate"><span class="pre">MACOS_FIREWALL_REFRESH=1</span></code> can
be passed to make to automatically add firewall rules preventing
firewall popups during testing. See
<code class="docutils notranslate"><span class="pre">make</span> <span class="pre">-f</span> <span class="pre">gmakefile.test</span> <span class="pre">help</span></code> for details</p></li>
<li><p><code class="docutils notranslate"><span class="pre">./configure</span> <span class="pre">--with-macos-firewall-rules</span></code> makes
<code class="docutils notranslate"><span class="pre">MACOS_FIREWALL=1</span></code> the default</p></li>
<li><p>Change <code class="docutils notranslate"><span class="pre">--download-petsc4py</span></code> to <code class="docutils notranslate"><span class="pre">--with-petsc4py</span></code> to have PETSc build
and use petsc4py</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">--download-mmg</span></code> and <code class="docutils notranslate"><span class="pre">--download-parmmg</span></code>, 3D unstructured mesh
adaptation package (interaction with DMPlex not available yet)</p></li>
<li><p>Improve detection of Git repositories when a <code class="docutils notranslate"><span class="pre">--download-package</span></code>
option is used</p>
<ul>
<li><p>Support <code class="docutils notranslate"><span class="pre">ssh://*.git</span></code> and <code class="docutils notranslate"><span class="pre">https://*.git</span></code> URLs without the
additional <code class="docutils notranslate"><span class="pre">git://</span></code> prefix</p></li>
<li><p>Local directories can be specified without the <code class="docutils notranslate"><span class="pre">git://</span></code>
prefix as well</p></li>
<li><p>Any valid Git repository (including bare and with
<code class="docutils notranslate"><span class="pre">--separate-git-dir</span></code>) is now correctly detected</p></li>
</ul>
</li>
<li><p><code class="docutils notranslate"><span class="pre">--download-yaml</span></code> or <code class="docutils notranslate"><span class="pre">--with-yaml</span></code> are no longer required for
YAML support (but can still be used to avoid compiling source
included with PETSc)</p></li>
</ul>
<p class="rubric">Sys:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre">PETSCRANDOMCURAND</span></code> to support CURAND random number generator</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscRandomGetValues.html">PetscRandomGetValues</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscRandomGetValuesReal.html">PetscRandomGetValuesReal</a>()</span></code> to retrieve
an array of random numbers</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">PetscOptions</span></code> argument to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscOptionsInsertFileYAML.html">PetscOptionsInsertFileYAML</a>()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscCalloc.html">PetscCalloc</a>()</span></code> to allocate zeroed memory</p></li>
<li><p>Automatically detect YAML and JSON option files by extension or
particular first line</p></li>
<li><p>Update YAML options file processing to ignore keys starting with
<code class="docutils notranslate"><span class="pre">$</span></code>, Add some special processing</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Bag/PetscBagViewFromOptions.html">PetscBagViewFromOptions</a>()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Log/PetscLogEventDeactivatePush.html">PetscLogEventDeactivatePush</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Log/PetscLogEventDeactivatePop.html">PetscLogEventDeactivatePop</a>()</span></code></p></li>
<li><p>Add new option to <code class="docutils notranslate"><span class="pre">-log_view</span></code> to view nested event timing
information as a flame graph</p></li>
</ul>
<p class="rubric">PetscViewer:</p>
<ul class="simple">
<li><p><code class="docutils notranslate"><span class="pre">PetscViewerAndFormat</span></code> now allows a payload</p></li>
<li><p>Change <code class="docutils notranslate"><span class="pre">PetscViewerFlowControlStepMaster()</span></code>,
<code class="docutils notranslate"><span class="pre">PetscViewerFlowControlEndMaster()</span></code> to
<code class="docutils notranslate"><span class="pre">PetscViewerFlowControlStepMain()</span></code>, <code class="docutils notranslate"><span class="pre">PetscViewerFlowControlEndMain()</span></code></p></li>
<li><p>HDF5: <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscFileMode.html">FILE_MODE_APPEND</a></span></code> (= <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscFileMode.html">FILE_MODE_UPDATE</a></span></code>) now creates a new file if it does not exist yet</p></li>
<li><p>VU: <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Viewer/PetscViewerVUSetMode.html">PetscViewerVUSetMode</a>()</span></code> is now deprecated;
please use standard <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Viewer/PetscViewerFileSetMode.html">PetscViewerFileSetMode</a>()</span></code> instead</p></li>
</ul>
<p class="rubric">PetscDraw:</p>
<p class="rubric">AO:</p>
<p class="rubric">IS:</p>
<p class="rubric">VecScatter / PetscSF:</p>
<ul class="simple">
<li><p><code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscSF/VecScatter.html">VecScatter</a></span></code> is now the same type as <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscSF/PetscSF.html">PetscSF</a></span></code>, in other words, we
have <code class="docutils notranslate"><span class="pre">typedef</span> <span class="pre"><a href="../manualpages/PetscSF/PetscSF.html">PetscSF</a></span> <span class="pre"><a href="../manualpages/PetscSF/VecScatter.html">VecScatter</a></span></code></p></li>
<li><p>Remove <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscSF/VecScatter.html">VecScatter</a></span></code> types <code class="docutils notranslate"><span class="pre">VECSCATTER{SEQ,MPI1,MPI3,MPI3NODE,SF}</span></code>. One
can use all <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscSF/PetscSF.html">PetscSF</a></span></code> types as <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscSF/VecScatter.html">VecScatter</a></span></code> types</p></li>
<li><p>Rename <code class="docutils notranslate"><span class="pre">PetscLayoutsCreateSF()</span></code> to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscSF/PetscSFCreateFromLayouts.html">PetscSFCreateFromLayouts</a>()</span></code> and
move its declaration from <code class="docutils notranslate"><span class="pre">petscis.h</span></code> to <code class="docutils notranslate"><span class="pre">petscsf.h</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre">MPIU_REPLACE</span></code>; Use <code class="docutils notranslate"><span class="pre">MPI_REPLACE</span></code> instead</p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre">PetscSFBcastAndOp</span></code> variants; Use <code class="docutils notranslate"><span class="pre">PetscSFBcast</span></code> instead</p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre">PetscSFCreateEmbeddedSF</span></code>; Use <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscSF/PetscSFCreateEmbeddedRootSF.html">PetscSFCreateEmbeddedRootSF</a></span></code>
instead</p></li>
<li><p>Add experimental NVIDIA NVSHMEM support; For details on how to use
it, contact <a class="reference external" href="mailto:petsc-maint%40mcs.anl.gov">mailto:petsc-maint<span>@</span>mcs<span>.</span>anl<span>.</span>gov</a></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscSF/PetscSFCreateByMatchingIndices.html">PetscSFCreateByMatchingIndices</a>()</span></code> to create SF by matching root
and leaf indices</p></li>
</ul>
<p class="rubric">PF:</p>
<p class="rubric">Vec:</p>
<ul class="simple">
<li><p>Change <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/Vec.html">Vec</a>{Get,Restore}Array{Read}Inplace</span></code> to
<code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/Vec.html">Vec</a>{Get,Restore}Array{Read}AndMemType()</span></code> and add an extra argument
to also return the memory type of the array</p></li>
<li><p>Remove vector type <code class="docutils notranslate"><span class="pre">VECNODE</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecConcatenate.html">VecConcatenate</a>()</span></code> function for vertically concatenating an
array of vectors into a single vector. Also returns an array of
index sets to access the original components within the
concatenated final vector</p></li>
</ul>
<p class="rubric">PetscSection:</p>
<p class="rubric">PetscPartitioner:</p>
<p class="rubric">Mat:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatSetPreallocationCOO.html">MatSetPreallocationCOO</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatSetValuesCOO.html">MatSetValuesCOO</a>()</span></code> to preallocate and
set values in a matrix using COO format. Currently efficiently
implemented only for <code class="docutils notranslate"><span class="pre">MATCUSPARSE</span></code></p></li>
<li><p>Add the option <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatOption.html">MAT_FORCE_DIAGONAL_ENTRIES</a></span></code> for <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatSetOption.html">MatSetOption</a>()</span></code>. It
forces allocation of all diagonal entries</p></li>
<li><p>Remove <code class="docutils notranslate"><span class="pre">MAT_NEW_DIAGONALS</span></code> from <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatOption.html">MatOption</a></span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">UNKNOW_NONZERO_PATTERN</span></code> as new value for <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatStructure.html">MatStructure</a></span></code>. It
indicates that the relationship is unknown, when set the AIJ
matrices check if the two matrices have identical patterns and if
so use the faster code</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatFactorType.html">MAT_FACTOR_QR</a></span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatQRFactor.html">MatQRFactor</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatQRFactorSymbolic.html">MatQRFactorSymbolic</a>()</span></code>, and
<code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatQRFactorNumeric.html">MatQRFactorNumeric</a>()</span></code> for QR factorizations. Currently the only
built-in implementation uses LAPACK on sequential dense matrices</p></li>
<li><p>Change option <code class="docutils notranslate"><span class="pre">-mat_cusparse_transgen</span></code> to <code class="docutils notranslate"><span class="pre">-mat_form_explicit_transpose</span></code> to hint PETSc to form an explicit transpose for repeated operations like MatMultTranspose. Currently implemented only for <code class="docutils notranslate"><span class="pre">AIJCUSPARSE</span></code> and <code class="docutils notranslate"><span class="pre">AIJKOKKOS</span></code></p></li>
<li><p>Add a <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatOption.html">MatOption</a></span></code> <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatOption.html">MAT_FORM_EXPLICIT_TRANSPOSE</a></span></code></p></li>
</ul>
<p class="rubric">PC:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCGAMGSetRankReductionFactors.html">PCGAMGSetRankReductionFactors</a>()</span></code>, provide an array,
<code class="docutils notranslate"><span class="pre">-pc_gamg_rank_reduction_factors</span> <span class="pre">factors</span></code>, tp specify factor by
which to reduce active processors on coarse grids in <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCGAMG.html">PCGAMG</a></span></code> that
overrides default heuristics</p></li>
<li><p>Change <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCCompositeAddPC.html">PCCompositeAddPC</a>()</span></code> to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCCompositeAddPCType.html">PCCompositeAddPCType</a>()</span></code>, now
<code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCCompositeAddPC.html">PCCompositeAddPC</a>()</span></code> adds a specific <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PC.html">PC</a></span></code> object</p></li>
<li><p>Add a Compatible Relaxation (CR) viewer <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCMG.html">PCMG</a></span></code> with <code class="docutils notranslate"><span class="pre">-pc_mg_adapt_cr</span></code></p></li>
<li><p>Experimental: Add support for assembling AIJ (CUSPARSE and KOKKOS)
matrix on the Cuda device with <code class="docutils notranslate"><span class="pre">MatSetValuesDevice()</span></code>,
<code class="docutils notranslate"><span class="pre">MatCUSPARSEGetDeviceMatWrite()</span></code>, and Kokkos with
<code class="docutils notranslate"><span class="pre">MatKokkosGetDeviceMatWrite</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCMGSetResidualTranspose.html">PCMGSetResidualTranspose</a>()</span></code> to support transposed linear solve
using <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCMG.html">PCMG</a></span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCGAMG.html">PCGAMG</a></span></code></p></li>
</ul>
<p class="rubric">KSP:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre">-all_ksp_monitor</span></code> which turns on monitoring for all KSP
solvers regardless of their prefix. This is useful for monitoring
solvers with inner solvers such as <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCMG.html">PCMG</a></span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCGAMG.html">PCGAMG</a></span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCFIELDSPLIT.html">PCFIELDSPLIT</a></span></code>.</p></li>
<li><p>Add support for monitor <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPPREONLY.html">KSPPREONLY</a></span></code>. This is useful for monitoring
solvers with inner solvers such as <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCMG.html">PCMG</a></span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCGAMG.html">PCGAMG</a></span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCFIELDSPLIT.html">PCFIELDSPLIT</a></span></code>.</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPConvergedReasonViewSet.html">KSPConvergedReasonViewSet</a>()</span></code> to set an ADDITIONAL function that
is to be used at the end of the linear solver to display the
convergence reason of the linear solver</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPConvergedReasonViewCancel.html">KSPConvergedReasonViewCancel</a>()</span></code> to remove all user-added
converged reason view functions</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPGetConvergedReasonString.html">KSPGetConvergedReasonString</a>()</span></code> to retrieve a human readable
string for ksp converged reason</p></li>
<li><p>Change <code class="docutils notranslate"><span class="pre">KSPReasonView()</span></code> to <code class="docutils notranslate"><span class="pre">KSPConvergenceReasonView()</span></code></p></li>
<li><p>Change <code class="docutils notranslate"><span class="pre">KSPReasonViewFromOptions()</span></code> to
<code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPConvergedReasonViewFromOptions.html">KSPConvergedReasonViewFromOptions</a>()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPConvergedDefaultSetConvergedMaxits.html">KSPConvergedDefaultSetConvergedMaxits</a>()</span></code> to declare convergence
when the maximum number of iterations is reached</p></li>
<li><p>Fix many <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSP.html">KSP</a></span></code> implementations to actually perform the number of
iterations requested</p></li>
<li><p>Chebyshev uses <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatOption.html">MAT_SPD</a></span></code> to default to CG for the eigen estimate</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPPIPECG2.html">KSPPIPECG2</a></span></code>, a pipelined solver that reduces the number of
allreduces to one per two iterations and overlaps it with two PCs
and SPMVs using non-blocking allreduce</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPConvergedRateView.html">KSPConvergedRateView</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPComputeConvergenceRate.html">KSPComputeConvergenceRate</a>()</span></code> to
check the convergence rate of a linear solve</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPSetUseExplicitTranspose.html">KSPSetUseExplicitTranspose</a>()</span></code> to explicitly transpose the
system in <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPSolveTranspose.html">KSPSolveTranspose</a>()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">KSPMonitorLGCreate()</span></code>, and remove <code class="docutils notranslate"><span class="pre">KSPMonitorLGResidualNorm*()</span></code>
and <code class="docutils notranslate"><span class="pre">KSPMonitorLGTrueResidualNorm*()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPMonitorError.html">KSPMonitorError</a>()</span></code>, used by <code class="docutils notranslate"><span class="pre">-ksp_monitor_error</span></code></p></li>
<li><p>Add arguments to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPMonitorSetFromOptions.html">KSPMonitorSetFromOptions</a>()</span></code> to allow line graphs
to be configured</p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSP.html">KSP</a>{Set|Get}MatSolveBlockSize()</span></code>, use
<code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSP.html">KSP</a>{Set|Get}MatSolveBatchSize()</span></code> instead</p></li>
<li><p>Reduce default <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPView.html">KSPView</a>()</span></code> ASCII output to a single subdomain’s
KSP/PC information for <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCASM.html">PCASM</a></span></code>, resp. <code class="docutils notranslate"><span class="pre">PCBJacobi</span></code>. Use
<code class="docutils notranslate"><span class="pre">-ksp_view</span> <span class="pre">::ascii_info_detail</span></code> to output KSP/PC information for all
subdomains</p></li>
</ul>
<p class="rubric">SNES:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESConvergedCorrectPressure.html">SNESConvergedCorrectPressure</a>()</span></code>, which can be selected using
<code class="docutils notranslate"><span class="pre">-snes_convergence_test</span> <span class="pre">correct_pressure</span></code></p></li>
<li><p>Remove <code class="docutils notranslate"><span class="pre">SNESMonitorLGCreate()</span></code> and <code class="docutils notranslate"><span class="pre">SNESMonitorLGResidualNorm()</span></code> which
are now handled by the default monitor</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESConvergedReasonViewSet.html">SNESConvergedReasonViewSet</a>()</span></code> to set an ADDITIONAL function
that is to be used at the end of the nonlinear solver to display
the convergence reason of the nonlinear solver</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESConvergedReasonViewCancel.html">SNESConvergedReasonViewCancel</a>()</span></code> to remove all user-added
converged reason view functions</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESGetConvergedReasonString.html">SNESGetConvergedReasonString</a>()</span></code> to retrieve a human readable
string for snes converged reason</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNESFAS/SNESFASFullSetTotal.html">SNESFASFullSetTotal</a>()</span></code> to use total residual restriction and
total solution interpolation in the initial cycle of full FAS
multigrid</p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre">-snes_nasm_sub_view</span></code>, use <code class="docutils notranslate"><span class="pre">-snes_view</span> <span class="pre">::ascii_info_detail</span></code> instead</p></li>
</ul>
<p class="rubric">SNESLineSearch:</p>
<p class="rubric">TS:</p>
<ul class="simple">
<li><p>Change to <code class="docutils notranslate"><span class="pre">--download-sundials2</span></code> to indicate the version of SUNDIALS
PETSc downloads, which is very old and out-dated</p></li>
<li><p>Add forward and adjoint sensitivity support for cases that involve
parameterized mass matrices</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/TS/TSGetNumEvents.html">TSGetNumEvents</a>()</span></code> to retrieve the number of events</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">-ts_monitor_cancel</span></code></p></li>
<li><p>Now <code class="docutils notranslate"><span class="pre">-ts_view_solution</span></code> respects the TS prefix</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/TS/TSSetMatStructure.html">TSSetMatStructure</a>()</span></code> to indicate the relationship between the
nonzero structures of the I Jacobian and the RHS Jacobian</p></li>
<li><p>Automatically set the <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatStructure.html">MatStructure</a></span></code> flag of TS to
<code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatStructure.html">SAME_NONZERO_PATTERN</a></span></code> if the RHS matrix is obtained with a
<code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatDuplicate.html">MatDuplicate</a>()</span></code> from the I Jacobian</p></li>
</ul>
<p class="rubric">TAO:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre">TaoSetRecycleFlag()</span></code> and <code class="docutils notranslate"><span class="pre">TaoGetRecycleFlag()</span></code> interfaces to
enable some Tao algorithms to re-use iterate information from the
previous <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Tao/TaoSolve.html">TaoSolve</a>()</span></code> call</p></li>
<li><p>Add new Augmented Lagrangian Multiplier Method (<code class="docutils notranslate"><span class="pre"><a href="../manualpages/Tao/TAOALMM.html">TAOALMM</a></span></code>) for
solving optimization problems with general nonlinear constraints</p></li>
</ul>
<p class="rubric">DM/DA:</p>
<ul class="simple">
<li><p>Remove unneeded <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/Vec.html">Vec</a></span></code> argument from <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMPatch/DMPatchZoom.html">DMPatchZoom</a>()</span></code></p></li>
<li><p>Change <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMDA/DMDACreatePatchIS.html">DMDACreatePatchIS</a>()</span></code> to collective operation and add an
extra argument to indicate whether off processor values will be
returned</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMComputeError.html">DMComputeError</a>()</span></code>, which uses <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DT/PetscDS.html">PetscDS</a></span></code> information for the exact
solution</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">DMShellGetGLobalVector()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMInterpolateSolution.html">DMInterpolateSolution</a>()</span></code> for interpolating solutions between
meshes in a potentially nonlinear way</p></li>
<li><p><code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMInterpolationSetUp.html">DMInterpolationSetUp</a>()</span></code> now can drop points outside the domain</p></li>
</ul>
<p class="rubric">DMSwarm:</p>
<ul class="simple">
<li><p><code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMSwarm/DMSwarmViewXDMF.html">DMSwarmViewXDMF</a>()</span></code> can now use a full path for the filename</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMSwarm/DMSwarmSetPointCoordinatesRandom.html">DMSwarmSetPointCoordinatesRandom</a>()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">-dm_view_radius</span></code> to set size of drawn particles</p></li>
</ul>
<p class="rubric">DMPlex:</p>
<ul class="simple">
<li><p>Using <code class="docutils notranslate"><span class="pre">-petscpartitioner_simple_node_grid</span></code> and
<code class="docutils notranslate"><span class="pre">-petscpartitioner_simple_process_grid</span></code>, the Simple partitioner can
now make grid partitions</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">DMGet/SetFieldAvoidTensor()</span></code> to allow fields to exclude tensor
cells in their definition</p></li>
<li><p>Remove regular refinement and marking from <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMPlex/DMPlexCreateDoublet.html">DMPlexCreateDoublet</a>()</span></code></p></li>
<li><p>Add high order FEM interpolation to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMInterpolationEvaluate.html">DMInterpolationEvaluate</a>()</span></code></p></li>
</ul>
<p class="rubric">FE/FV:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DUALSPACE/PetscDualSpaceTransformHessian.html">PetscDualSpaceTransformHessian</a>()</span></code>,
<code class="docutils notranslate"><span class="pre"><a href="../manualpages/DUALSPACE/PetscDualSpacePushforwardHessian.html">PetscDualSpacePushforwardHessian</a>()</span></code>, and
<code class="docutils notranslate"><span class="pre"><a href="../manualpages/FE/PetscFEPushforwardHessian.html">PetscFEPushforwardHessian</a>()</span></code></p></li>
<li><p>Now <code class="docutils notranslate"><span class="pre"><a href="../manualpages/FE/PetscFEGetCellTabulation.html">PetscFEGetCellTabulation</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/FE/PetscFEGetFaceTabulation.html">PetscFEGetFaceTabulation</a>()</span></code> ask
for the number of derivatives</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">PetscDualSpaceLagrangeGet/SetUseMoments()</span></code> and
<code class="docutils notranslate"><span class="pre">PetscDualSpaceLagrangeGet/SetMomentOrder()</span></code> to allow a moment
integral for P0</p></li>
</ul>
<p class="rubric">DMNetwork:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMNetwork/DMNetworkAddSubnetwork.html">DMNetworkAddSubnetwork</a>()</span></code> for network of subnetworks</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">DMNetworkAdd/GetSharedVertices()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMNetwork/DMNetworkIsSharedVertex.html">DMNetworkIsSharedVertex</a>()</span></code></p></li>
<li><p>Remove <code class="docutils notranslate"><span class="pre">DMNetworkSetEdgeList()</span></code>,
<code class="docutils notranslate"><span class="pre">DMNetworkSet/GetComponentNumVariables()</span></code>,
<code class="docutils notranslate"><span class="pre">DMNetworkSet/Add/GetNumVariables()</span></code>,
<code class="docutils notranslate"><span class="pre">DMNetworkGetComponentKeyOffset()</span></code>, <code class="docutils notranslate"><span class="pre">DMNetworkGetVariableOffset()</span></code>,
<code class="docutils notranslate"><span class="pre">DMNetworkGetVariableGlobalOffset()</span></code></p></li>
<li><p>Change the prototypes for <code class="docutils notranslate"><span class="pre">DMNetworkAdd/GetComponent()</span></code></p></li>
<li><p>Rename <code class="docutils notranslate"><span class="pre">DMNetworkSet/GetSizes()</span></code> to <code class="docutils notranslate"><span class="pre">DMNetworkSet/GetNumSubNetworks()</span></code></p></li>
<li><p>Rename <code class="docutils notranslate"><span class="pre">DMNetworkGetComponentVariableOffset()</span></code> to
<code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMNetwork/DMNetworkGetLocalVecOffset.html">DMNetworkGetLocalVecOffset</a>()</span></code>,
<code class="docutils notranslate"><span class="pre">DMNetworkGetComponentVariableGlobalOffset()</span></code> to
<code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMNetwork/DMNetworkGetGlobalVecOffset.html">DMNetworkGetGlobalVecOffset</a>()</span></code></p></li>
<li><p>Rename <code class="docutils notranslate"><span class="pre">DMNetworkGetSubnetworkInfo()</span></code> to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMNetwork/DMNetworkGetSubnetwork.html">DMNetworkGetSubnetwork</a>()</span></code></p></li>
</ul>
<p class="rubric">DT:</p>
<ul class="simple">
<li><p><code class="docutils notranslate"><span class="pre"><a href="../manualpages/DT/PetscDSCopyBoundary.html">PetscDSCopyBoundary</a>()</span></code> now takes a list of fields for which
boundary copying is done</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">PetscDSGet/SetJetDegree()</span></code>, and <code class="docutils notranslate"><span class="pre">-dm_ds_jet_degree</span></code> is needed to
enable it under a DM</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DT/PetscWeakForm.html">PetscWeakForm</a></span></code> class to manage function pointers for problem
assembly</p></li>
</ul>
<p class="rubric">Fortran:</p>
<ul class="simple">
<li><p>Add configure option <code class="docutils notranslate"><span class="pre">--with-mpi-f90module-visibility</span></code>
[default=``1``]. With <code class="docutils notranslate"><span class="pre">0</span></code>, <code class="docutils notranslate"><span class="pre">mpi.mod</span></code> will not be visible in use code
(via <code class="docutils notranslate"><span class="pre">petscsys.mod</span></code>) - so <code class="docutils notranslate"><span class="pre">mpi_f08</span></code> can now be used</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscDLAddr.html">PetscDLAddr</a>()</span></code> to get name for a symbol</p></li>
</ul>
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