petsc-3.12.0 2019-09-29
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PCGASMSetUseDMSubdomains

Indicates whether to use DMCreateDomainDecomposition() to define the subdomains, whenever possible. Logically Collective

Synopsis

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

Input Parameter

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

Notes

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

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

Level

intermediate

Location

src/ksp/pc/impls/gasm/gasm.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages