PCASMGetSubKSP

Gets the local KSP contexts for all blocks on this processor.

Synopsis

#include "petscpc.h" 
PetscErrorCode PCASMGetSubKSP(PC pc, PetscInt *n_local, PetscInt *first_local, KSP *ksp[])

Collective iff first_local is requested

Input Parameter

• pc - the preconditioner context

Output Parameters

• n_local - the number of blocks on this processor or NULL

• first_local - the global number of the first block on this processor or NULL, all processors must request or all must pass NULL

• ksp - the array of KSP contexts

Notes

After PCASMGetSubKSP() the array of KSPs is not to be freed.

You must call KSPSetUp() before calling PCASMGetSubKSP().

Fortran Note

The output argument ‘ksp’ must be an array of sufficient length or PETSC_NULL_KSP. The latter can be used to learn the necessary length.

See Also

PCASM, PCASMSetTotalSubdomains(), PCASMSetTotalSubdomains(), PCASMSetOverlap(), PCASMCreateSubdomains2D(),

Level

advanced

Location

src/ksp/pc/impls/asm/asm.c

Examples

src/ksp/ksp/tutorials/ex8.c

Implementations

PCASMGetSubKSP_ASM in src/ksp/pc/impls/asm/asm.c

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