PCGASMGetSubdomains#

Gets the subdomains supported on this MPI rank for the PCGASM additive Schwarz preconditioner.

Synopsis#

#include "petscpc.h" 
PetscErrorCode PCGASMGetSubdomains(PC pc, PetscInt *n, IS *iis[], IS *ois[])

Not Collective

Input Parameter#

  • pc - the preconditioner context

Output Parameters#

  • n - the number of subdomains for this MPI rank (default value = 1)

  • iis - the index sets that define the inner subdomains (without overlap) supported on this rank (can be NULL)

  • ois - the index sets that define the outer subdomains (with overlap) supported on this rank (can be NULL)

Note#

The user is responsible for destroying the ISs and freeing the returned arrays. The IS numbering is in the parallel, global numbering of the vector.

See Also#

PCGASM, PCGASMSetOverlap(), PCGASMGetSubKSP(), PCGASMCreateSubdomains2D(), PCGASMSetSubdomains(), PCGASMGetSubmatrices()

Level#

advanced

Location#

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

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