petsc-3.12.5 2020-03-29
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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 on pc 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

Note

After PCASMGetSubKSP() the array of KSPes 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

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

Level

advanced

Location

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

Examples

src/ksp/ksp/examples/tutorials/ex8.c.html

Implementations

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

Index of all PC routines
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Index of all manual pages