Changes: 3.18

Changes you should make for main and version 3.18 so that it is portable to previous versions of PETSc

• Remove the error handling from uses of PetscOptionsBegin(), PetscOptionsEnd(), PetscObjectOptionsBegin(), PetscOptionsHead(), and PetscOptionsTail()

• Remove the error handling from uses of PetscDrawCollectiveBegin() and PetscDrawCollectiveEnd()

• Remove the error handling from uses of MatPreallocateInitialize() and MatPreallocateFinalize()

• Replace MatUpdateMPIAIJWithArrays() with MatUpdateMPIAIJWithArray()

Changes you can make for main and version 3.18 so that is not portable to previous versions of PETSc. This will remove all deprecation warnings when you build. In addition to the changes above

• Change PetscOptionsHead() and PetscOptionsTail() to PetscOptionsHeadBegin() and PetscOptionsHeadEnd()

• Change MatPreallocateInitialize() and MatPreallocateFinalize() to MatPreallocateBegin() and MatPreallocateEnd()

• Change uses of MatGetOption() with MAT_SYMMETRIC, MAT_STRUCTURALLY_SYMMETRIC, MAT_HERMITIAN, MAT_SPD to calls to MatIsSymmetric(), MatIsSymmetricKnown() etc.

• Whenever you call MatSetOption() with one of the above options and it is intended to stay with the matrix through calls to MatSetValues() etc add a call to MatSetOption() with MAT_SYMMETRY_ETERNAL etc

General:

• Add native PETSc/HIP backend for AMD GPUs

• Add PETSC_ERR_RETURN to signal when an error handler returns 0 in PetscError()

• Change behavior of SETERRQ() when PetscError() returns 0 via user-set error handler. In such cases SETERRQ() now returns PETSC_ERR_RETURN (a nonzero value) instead. Previously the value (0) would be propagated as-is. Note that while returning 0 from error handlers in PetscError() is supported, doing so is discouraged

• Change PetscOptionsBegin(), PetscOptionsEnd(), and PetscObjectOptionsBegin() to not return an error code

• Change PetscOptionsHead(), PetscOptionsTail(), to PetscOptionsHeadBegin() and PetscOptionsHeadEnd() and to not return an error code

• Enable MPI_Datatype type-checking to ensure that the type of the pointer passed to communication routines (e.g. PetscSFBcastBegin()) matches the corresponding MPI_Datatype argument. Compilers supporting this feature will emit a warning in case of mismatch. These may be disabled by defining PETSC_SKIP_ATTRIBUTE_MPI_TYPE_TAG prior to all PETSc header-file inclusions

• Add PETSC_ATTRIBUTE_FORMAT() to enable compile-time printf()-style format specifier checking and apply it any PETSc functions taking a format string

• Deprecate the use of %D for printing PetscInt in favor of %" PetscInt_FMT ". Compilers may now emit warnings when using %D as a result of applying PETSC_ATTRIBUTE_FORMAT. Users that need to support older versions of PETSc may do one of two things:

  1. Recommended Insert the following code block after all PETSc header-file inclusions

     #if !defined(PetscInt_FMT)
     #  if defined(PETSC_USE_64BIT_INDICES)
     #    if !defined(PetscInt64_FMT)
     #      if defined(PETSC_HAVE_STDINT_H) && defined(PETSC_HAVE_INTTYPES_H) && defined(PETSC_HAVE_MPI_INT64_T)
     #        include <inttypes.h>
     #        define PetscInt64_FMT PRId64
     #      elif (PETSC_SIZEOF_LONG_LONG == 8)
     #        define PetscInt64_FMT "lld"
     #      elif defined(PETSC_HAVE___INT64)
     #        define PetscInt64_FMT "ld"
     #      else
     #        error "cannot determine PetscInt64 type"
     #      endif
     #    endif
     #    define PetscInt_FMT PetscInt64_FMT
     #  else
     #    define PetscInt_FMT "d"
     #  endif
     #endif
     

     This will ensure that the appropriate format specifiers are defined regardless of PETSc version.

  2. Not Recommended Compilers warnings can be permanently suppressed by defining PETSC_SKIP_ATTRIBUTE_FORMAT prior to all PETSc header-file inclusions

• chkerrconvert.py (${PETSC_DIR}/share/petsc/chkerrconvert.py) now also handles possible spaces between the semi-colon and CHKERR construct when replacing.

Configure/Build:

• Remove python2 support, python-3.4+ is now required

Sys:

• Change calling sequence of PetscObjectProcessOptionsHandler() to flip the role of the first two arguments

• Change -log_view to no longer print out the amount of memory associated with different types of objects. That data was often incorrect

• Change PetscCall() from Fortran so that call PetscFunction(args,ierr);CHKERRQ(ierr); can be replaced with PetscCall(PetscFunction(args,ierr))

• Add PetscCallA() from Fortran so that call PetscFunction(args,ierr);CHKERRA(ierr); can be replaced with PetscCallA(PetscFunction(args,ierr))

• Add PetscCallMPI() and PetscCallMPIA() that may be used to call MPI functions from Fortran

• Change the PetscCheck() and PetscAssert() macros to behave like function calls by wrapping in do { } while (0). Previously these macros expanded to if (...) SETERRQ(...), which meant they could be chained with subsequent conditionals

• Change PetscStackCallStandard() to PetscCallExternal()

• Change PetscStackCall() to PetscStackCallExternalVoid()

• Change PetscStackCallXXX() to PetscCallXXX()

• Add PetscCallBack()' for calling all PETSc callbacks (usually to user code) to replace the use of ``PetscStackPush() and PetscStackPop

• Add PetscTryTypeMethod() and PetscUseTypeMethod() to replace direct calls of the form (\*obj->ops->op)(obj,...)

• Add PetscMemTypeToString() to convert PetscMemType to string

• Add PetscOffloadMaskToString() to (shockingly) convert PetscOffloadMask to string

• Add PetscOffloadMaskToMemType()

• Add PetscDeviceCopyMode

• Add PetscMemoryAccessMode

• Split off CUDA and HIP specific headers from petscdevice.h into petscdevice_cuda.h and petscdevice_hip.h

• Add petscdevice_cupm.h

• Allow PetscDevice and PetscDeviceContext API to be callable from C via stub macros

• Replace PETSC_DEVICE_INVALID with PETSC_DEVICE_HOST

• Make PETSC_DEVICE_DEFAULT() a function

• Add PetscDeviceSetDefaultDeviceType()

• Make PetscDeviceContext into a PetscObject

• Add PetscDeviceContextGetDeviceType() convenience function

• Add PetscDeviceContextForkWithStreamType()

• Change PetscDeviceContextSetFromOptions() to no longer accept the options prefix (PetscDeviceContext now has one as a PetscObject)

• Add PetscDeviceContextView()

• Add PetscDeviceContextViewFromOptions()

• Add PetscDeviceMalloc()

• Add PetscDeviceCalloc()

• Add PetscDeviceFree()

• Add PetscDeviceMemcpy()

• Add PetscDeviceArrayCopy()

• Add PetscDeviceMemset()

• Add PetscDeviceArrayZero()

• Deprecate PetscLogObjectParent()

• Deprecate PetscLogObjectMemory()

• Deprecate PetscNewLog(), users should just use PetscNew() instead

• Add PetscHasBuiltin() to detect whether a particular builtin function is supported by the compiler

• Add PetscAssume() to indicate an invariant condition to the compiler

• Add PetscSortedInt64(), PetscSortInt64() and PetscSortCount() for sorting and checking arrays of these types

• Add PetscHMapObjCreate() and all associated hash map routines for holding PETSc objects

• Add PetscObjectDelayedDestroy(), PetscGarbageKeySortedIntersect(), PetscGarbageCleanup() and PetscGarbageView() for memory cleanup operations in managed languages

• Remove unused preprocessor variables PETSC_Alignx, PETSC_const, and PETSC_HAVE_GETARG

Event Logging:

Add NVIDIA NVTX sections to Default event logging. This tags code sections, like stages, with nvtxRangePushA(char name[]) and nvtxRangePop(), which can be visualized after the run with the NVIDIA Nsight GUI tool. To generate a data file, run code with nsys profile -f true -o file-name exec-name.

PetscViewer:

• Change PetscViewerHDF5GetGroup() to accept optional path relative to the pushed group and always return absolute path (newly allocated)

• Change PetscViewerHDF5OpenGroup() to accept optional path relative to the pushed group

• Add PetscViewerHDF5WriteGroup()

PetscDraw:

• Add PetscDrawSPGetDimension()

• Change PetscDrawCollectiveBegin() and PetscDrawCollectiveEnd() to not return an error code. Users can remove the error code checking for these functions and it will work correctly for all versions of PETSc

AO:

IS:

• Add ISShift()

VecScatter / PetscSF:

• Add PetscSFGetGraphLayout()

PF:

Vec:

• Add VecSetPreallocationCOO(), VecSetValuesCOO() and VecSetPreallocationCOOLocal() to support vector assembly with coordinates

• Add VecStrideSum() and VecStrideSumAll() for summing subvectors of strided vectors

• Add VecCreateLocalVector() to be used for calls involving Vec{Get|Restore}LocalVector()

PetscSection:

• Add PetscSectionCreateSubdomainSection()

PetscPartitioner:

Mat:

• Change MatPreallocateInitialize() and MatPreallocateFinalize() to MatPreallocateBegin() and MatPreallocateEnd() and to not return an error code

• Change MatDenseGetSubMatrix() to be able to retrieve only selected contiguous rows instead of all rows

• Add MatSetOptionsPrefixFactor() and MatAppendOptionsPrefixFactor() to allow controlling the options prefix used by factors created from this matrix

• Change MatSetOptionsPrefix() to no longer affect the options prefix used by factors created from this matrix

• Change matrix factor options called from within KSP/PC to always inherit the options prefix from the KSP/PC, not the options prefix in the originating matrix

• Add MatIsStructurallySymmetricKnown() and MatIsSPDKnown()

• Change MatGetOption() to no longer produce results for MAT_STRUCTURALLY_SYMMETRIC, MAT_SYMMETRIC, MAT_SPD, and MAT_HERMITIAN

• Add MatCreateGraph() to create a scalar matrix for use in graph algorithms

• Add an option -mat_factor_bind_factorization <host, device> to control where to do matrix factorization. Currently only supported with SEQAIJCUSPARSE matrices.

• Add MatUpdateMPIAIJWithArray() and deprecate MatUpdateMPIAIJWithArrays()

• Change the coordinate array parameters in MatSetPreallocationCOO from const to non-const

• Add enforcement of the previously unenforced rule that MAT_REUSE_MATRIX with MatTranspose() can only be used after a call to MatTranspose() with MAT_INITIAL_MATRIX. Add MatTransposeSetPrecursor() to allow using MAT_REUSE_MATRIX with MatTranspose() without the initial call to MatTranspose().

• Add MatTransposeSymbolic()

• Add MatShellSetContextDestroy() and add internal refrence counting for user defined MatShell context data

• Add MatShellSetContextDestroy() and add internal reference counting for user defined MatShell context data

• Change MATTRANPOSEMAT to MATTRANPOSEVIRTUAL

• Add MATHERMITIANTRANSPOSEVIRTUAL

MatCoarsen:

• Add MISK coarsening type. Distance-k maximal independent set (MIS) C-F coarsening with a greedy, MIS based aggregation algorithm

PC:

• Add PC type of mpi which can be used in conjunction with -mpi_linear_solver_server to use MPI parallelism to solve a system created on a single MPI rank

• Add PCHYPREAMSSetInteriorNodes() to set interior nodes for HYPRE AMS

• Add PCAMGX, a PC interface for NVIDIA’s AMGx AMG solver

• Remove PCGAMGSetSymGraph() and -pc_gamg_sym_graph. The user should now indicate symmetry and structural symmetry using MatSetOptions() and GAMG will symmetrize the graph if a symmetric options is not set

• Change -pc_gamg_reuse_interpolation default from false to true.

KSP:

• Deprecate KSPHPDDMGetDeflationSpace() (resp. KSPHPDDMSetDeflationSpace()) in favor of KSPHPDDMGetDeflationMat() (resp. KSPHPDDMSetDeflationMat())

• Add KSPNONE as alias for KSPPREONLY

SNES:

• Add DMDASNESSetFunctionLocalVec(), DMDASNESSetJacobianLocalVec() and DMDASNESSetObjectiveLocalVec(), and associate types DMDASNESFunctionVec, DMDASNESJacobianVec and DMDASNESObjectiveVec, which accept Vec parameters instead of void pointers in contrast to versions without the Vec suffix

• Add SNESLINESEARCHNONE as alias for SNESLINESEARCHBASIC

• Add DMSNESSetFunctionContextDestroy() and DMSNESSetJacobianContextDestroy() and use PetscContainter for user context to facilitate automatic destruction of user set context

SNESLineSearch:

TS:

• Add TSSetTimeSpan(), TSGetTimeSpan() and TSGetTimeSpanSolutions() to support time span

• Add DMTSGetIFunctionLocal(), DMTSGetIJacobianLocal(), and DMTSGetRHSFunctionLocal()

• Add DMTSSetIFunctionContextDestroy(), DMTSSetIJacobianContextDestroy(), DMTSSetRHSFunctionContextDestroy(), DMTSSetRHSJacobianContextDestroy(), DMTSSetI2FunctionContextDestroy(), and DMTSSetI2JacobianContextDestroy() and use PetscContainter for user context to facilitate automatic destruction of user set context

• Make public SNESVIComputeMeritFunction() and SNESVIComputeFunction()

TAO:

• Rename the command line option -tao_nm_lamda to -tao_nm_lambda

DM/DA:

• Add DMDAMapMatStencilToGlobal() to map MatStencils to global indices

• Add DMGetCellCoordinateDM(), DMSetCellCoordinateDM(), DMGetCellCoordinateSection(), DMSetCellCoordinateSection(), DMGetCellCoordinates(), DMSetCellCoordinates(), DMGetCellCoordinatesLocalSetup(), DMGetCellCoordinatesLocal(), DMGetCellCoordinatesLocalNoncollective(), DMSetCellCoordinatesLocal()

• Add DMFieldCreateDSWithDG() to allow multiple representations of a given field

• Add DMProjectFieldLabel()

• Make public DMSetVI() and DMDestroyVI()

• Change DMCountNonCyclicReferences() to DMCountNonCyclicReferences_Internal()

• Add DMCountNonCyclicReferences() as a more generic wrapper for DMCountNonCyclicReferences_Internal()

DMSwarm:

• Add DMSwarmGetCoordinateFunction(), DMSwarmSetCoordinateFunction(), DMSwarmGetVelocityFunction(), DMSwarmSetVelocityFunction() to allow flexible layout of particles

DMPlex:

• Add DMLabelPropagateBegin(), DMLabelPropagatePush(), and DMLabelPropagateEnd()

• Add DMPlexPointQueue and API

• Add label value argument to DMPlexLabelCohesiveComplete() and DMPlexCreateHybridMesh()

• Change DMPlexCheckPointSF() to take optional PetscSF parameter

• Add DMPlexCheck()

• Add DMPlexMetricDeterminantCreate() for creating determinant fields for Riemannian metrics

• Change DMPlexMetricEnforceSPD():

  • pass determinant Vec, rather than its address

  • pass output metric, rather than its address

• Change DMPlexMetricNormalize():

  • pass output metric, rather than its address

  • pass determinant Vec, rather than its address

• Change DMPlexMetricAverage(), DMPlexMetricAverage2() and DMPlexMetricAverage3() to pass output metric, rather than its address

• Change DMPlexMetricIntersection(), DMPlexMetricIntersection2() and DMPlexMetricIntersection3() to pass output metric, rather than its address

• Add capability to specify whether the DMPlex should be reordered by default:

  • add DMPlexReorderDefaultFlag

  • add DMPlexReorderGetDefault() and DMPlexReorderSetDefault() to get and set this flag

• Add DMPlexCreateOverlapLabelFromLabels() for more customized overlap

• Add DMPlexSetOverlap() to promote an internal interface

• Add DMGetCellCoordinateDM(), DMSetCellCoordinateDM(), DMGetCellCoordinateSection(), DMSetCellCoordinateSection(), DMGetCellCoordinates(), DMSetCellCoordinates(), DMGetCellCoordinatesLocalSetUp(), DMGetCellCoordinatesLocal(), DMGetCellCoordinatesLocalNoncollective(), and DMSetCellCoordinatesLocal() to provide an independent discontinuous representation of coordinates

• Change DMGetPeriodicity() and DMSetPeriodicity() to get rid of the flag and boundary type. Since we have an independent representation, we can tell if periodicity was imposed, and boundary types were never used, so they can be inferred from the given L. We also add Lstart to allow tori that do not start at 0.

• Add DMPlexGetCellCoordinates() and DMPlexRestoreCellCoordinates() for clean interface for periodicity

• Add DMPlexDistributionSetName() and DMPlexDistributionGetName() to set/get the name of the specific parallel distribution of the DMPlex

FE/FV:

• Add PetscFECreateFromSpaces() to build similar space from pieces

DMNetwork:

• Add DMNetworkFinalizeComponents() to setup the internal data structures for components on a network. Previously this could only be done by calling DMSetUp

DMStag:

DT:

• Add probability distributions PetscPDFGaussian3D(), PetscPDFSampleGaussian3D(), PetscPDFConstant2D(), PetscCDFConstant2D(), PetscPDFSampleConstant2D(), PetscPDFConstant3D(), PetscCDFConstant3D(), PetscPDFSampleConstant3D()

Fortran: