PCGASMSetUseDMSubdomains#

Indicates whether to use DMCreateDomainDecomposition() to define the subdomains, whenever possible for PCGASM

Synopsis#

#include "petscpc.h" 
PetscErrorCode PCGASMSetUseDMSubdomains(PC pc, PetscBool flg)

Logically Collective

Input Parameters#

  • pc - the preconditioner

  • flg - boolean indicating whether to use subdomains defined by the DM

Options Database Key#

  • -pc_gasm_dm_subdomains - pc_gasm_overlap -pc_gasm_total_subdomains

Note#

PCGASMSetSubdomains(), PCGASMSetTotalSubdomains() or PCGASMSetOverlap() take precedence over PCGASMSetUseDMSubdomains(), so setting PCGASMSetSubdomains() with nontrivial subdomain ISs or any of PCGASMSetTotalSubdomains() and PCGASMSetOverlap() automatically turns the latter off.

See Also#

PCGASM, PCGASMGetUseDMSubdomains(), PCGASMSetSubdomains(), PCGASMSetOverlap() PCGASMCreateSubdomains2D()

Level#

intermediate

Location#

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

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