MatPartitioningSetFromOptions#

Sets various partitioning options from the options database for the partitioning object

Synopsis#

#include "petscmat.h" 
PetscErrorCode MatPartitioningSetFromOptions(MatPartitioning part)

Collective

Input Parameter#

part - the partitioning context.

Options Database Keys#

-mat_partitioning_type - (for instance, parmetis), use -help for a list of available methods
-mat_partitioning_nparts - number of subgraphs

Note#

If the partitioner has not been set by the user it uses one of the installed partitioner such as ParMetis. If there are no installed partitioners it does no repartioning.

Level#

beginner

Location#

src/mat/partition/partition.c

Examples#

src/ksp/ksp/tutorials/ex64.c
src/mat/tutorials/ex11.c
src/mat/tutorials/ex15.c
src/mat/tutorials/ex15f.F90
src/mat/tutorials/ex17.c
src/mat/tutorials/ex17f.F90

Implementations#

MatPartitioningSetFromOptions_Chaco in src/mat/partition/impls/chaco/chaco.c
MatPartitioningSetFromOptions_Hierarchical in src/mat/partition/impls/hierarchical/hierarchical.c
MatPartitioningSetFromOptions_Party in src/mat/partition/impls/party/party.c
MatPartitioningSetFromOptions_Parmetis in src/mat/partition/impls/pmetis/pmetis.c
MatPartitioningSetFromOptions_PTScotch in src/mat/partition/impls/scotch/scotch.c

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