petsc-3.5.1 2014-07-24
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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.

Currently for some matrix implementations only 1 block per processor is supported.

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

Fortran note

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

Keywords

PC, ASM, additive Schwarz, get, sub, KSP, context

See Also

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

Level:advanced
Location:
src/ksp/pc/impls/asm/asm.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages

Examples

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