PCFieldSplitSetBlockSize#
Sets the block size for defining where fields start in the fieldsplit preconditioner when calling PCFieldSplitSetFields(). If not set the matrix block size is used.
Synopsis#
#include "petscpc.h"
PetscErrorCode PCFieldSplitSetBlockSize(PC pc, PetscInt bs)
Logically Collective
Input Parameters#
pc - the preconditioner context
bs - the block size
Note#
If the matrix is a MATNEST then the is_rows[] passed to MatCreateNest() determines the fields.
See Also#
Solving Block Matrices with PCFIELDSPLIT, PC, PCFieldSplitGetSubKSP(), PCFIELDSPLIT, PCFieldSplitSetFields(), PCFieldSplitSetIS()
Level#
intermediate
Location#
Examples#
src/ksp/ksp/tutorials/ex42.c
src/ksp/ksp/tutorials/ex70.c
src/ksp/ksp/tutorials/ex43.c
Implementations#
PCFieldSplitSetBlockSize_FieldSplit() in src/ksp/pc/impls/fieldsplit/fieldsplit.c
Index of all PC routines
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Index of all manual pages