petsc-3.13.6 2020-09-29

PCGASMGetSubKSP

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

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

Collective on PC iff first_local is requested

pc -the preconditioner context

	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

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().

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