petsc-dev 2014-08-19
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PCGASMGetSubKSP

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

Synopsis

#include "petscpc.h" 
PetscErrorCode  PCGASMGetSubKSP(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 PCGASMGetSubKSP() 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 PCGASMGetSubKSP().

Keywords

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

See Also

PCGASMSetTotalSubdomains(), PCGASMSetSubdomains(), PCGASMSetOverlap(),
PCGASMCreateSubdomains2D(),

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

Examples

src/ksp/ksp/examples/tutorials/ex8g.c.html