–download-f-blas-lapack is now –download-fblaslapack.
PETSc built with –with-precision=__float128 will now by default read in binary files that have all 128 bits stored in the file, to read in files with 64 bit double use the option -binary_read_double
PETSc options of complex numbers must be passed as [+/-][realnumber][+/-]realnumberi with no spaces, you can no longer pass the real and complex part with a comma between them
PetscSynchronizedFlush() takes an additional argument, the file pointer on rank 0
PetscObjectStateQuery() is now corrected with PetscObjectStateGet()
A new PetscObjectState typedef is used by interface; 64-bit int to prevent overflow.
The configure option
--with-dynamic-loadinghas been removed since this functionality is automatically available on systems that support it. Use the runtime option
-dynamic_library_preloadfor similar functionality.
Default location of externalpackages is moved from
--with-cleanoption to delete the build files in
PETSC_DIR/PETSC_ARCHat the beginning of the build
__INSDIR__) is no longer used. We recommend passing full paths or paths from the project root to the compiler so that error messages contain enough context.
The “type” argument to
PetscNewLog()have been removed. The type is now inferred from the pointer return type.
PetscMalloc1()is now available for allocating arrays, and
PetscCalloc7()have been added for when cleared (zeroed) memory is needed.
Moved matlab scripts like PetscBinaryRead.m PetscBinaryWrite.m from bin/matlab to share/petsc/matlab
ISLocalToGlobalMappingCreate() now takes a blocksize. Added ISLocalToGlobalMappingApplyBlock() removed ISLocalToGlobalMappingBlock() and ISLocalToGlobalMappingUnblock()
Now only the F90 binding for VecSetValuesSection() is present
Removed third argument to MatNullSpaceRemove(). Use VecDuplicate() and VecCopy() if the original Vec must be kept.
MatGetRedundantMatrix(Mat mat,PetscInt nsubcomm,MPI_Comm subcomm,PetscInt mlocal_red,MatReuse reuse,Mat *matredundant) is replaced by MatRedundantMatrix(Mat mat,PetscInt nsubcomm,MPI_Comm subcomm,MatReuse reuse,Mat *matredundant).
MatGetColoring() has been removed and replaced by the MatColoring object.
PCASA has been removed, it never worked properly
The documented, but semi-private function
PCMGResidual_Default()is now public and named
PCGAMG default smoother changed from PCJACOBI to PCSOR.
Different logic for PCBDDC APIs: added PCBDDCSet/GetDirichlet/NeumannBoundariesLocal, PCBDDCSetDofsSplittingLocal. Previous call to PCBDDCXXXBoundaries should be replaced by PCBDDCXXXBoundariesLocal. The same holds for setting the fields split. In all cases, the index sets should have the same communicator as the PC.
Added PCBDDCSetChangeOfBasisLocalMat for user defined change of basis
PCFieldSplitSchurPrecondition()deprecated (replaced in Fortran) in favor of
KSPSetOperators()no longer has the
MatStructureargument. The Mat objects now track that information themselves. Use
KSP/PCSetReusePreconditioner()to prevent the recomputation of the preconditioner if the operator changed in the way that
KSPConvergedDefaultSetUMIRNorm(). for consistency.
SNESSetInitialFunctionNorm()is removed as it’s not necessary given that the norm is cached on the Vec. Use only
GSand _gs used for nonlinear Gauss-Sidel changed to
NGSand _ngs to match all the other nonlinear solver names.
DMDAGetLocalToGlobalMappingBlock() has been removed, the DMDAGetLocalToGlobalMapping() now handles both block and non-block cases
DMDAGetGlobalIndices(DM,PetscInt*,const PetscInt*) and DMDARestoreGlobalIndices(DM,PetscInt*,const PetscInt*) are removed, use DMGetLocalToGlobalMapping() to get this information
DMADDA has been removed, it never worked correctly
The MatType argument is removed from DMCreateMatrix(), you can use DMSetMatType() to indicate the type you want used with a DM, defaults to MATAIJ
DMBoundaryType, and all the enumeration values have also been renamed.
Sieve/DMMesh has been removed entirely. Use DMPlex.
PETSC_DEFAULT_DOUBLE_PRECISION has been replaced with PETSC_DEFAULT_REAL
--download-cholmodto download UMFPACK and CHOLMOD have been removed. Use
--download-suitesparseto download these packages.
Added interface to Pardiso solver in Intel MKL. To use MKL_Pardiso, PETSc should be configured with
--blas-lapack-dir=LOCATION_OF_INTEL_MKL --with-mkl_pardiso-dir=LOCATION_OF_INTEL_MKLand then run the code with
-pc_type lu -pc_factor_mat_solver_package mkl_pardiso