petsc-3.13.6 2020-09-29
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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().

See Also

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

Level

advanced

Location

src/ksp/pc/impls/gasm/gasm.c

Examples

src/ksp/ksp/tutorials/ex62.c.html

Implementations

PCGASMGetSubKSP_GASM in src/ksp/pc/impls/gasm/gasm.c

Index of all PC routines
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Index of all manual pages