petsc-3.14.6 2021-03-30

PCASMGetSubKSP

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

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

Collective on pc iff first_local is requested

- 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 PCASMGetSubKSP() the array of KSPes is not to be freed.

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

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.

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