petsc-3.14.5 2021-03-03
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# PCASMSetDMSubdomains

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

### Synopsis

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

Logically Collective

### Input Parameter

| pc | - the preconditioner
| flg | - boolean indicating whether to use subdomains defined by the DM

### Options Database Key

| -pc_asm_dm_subdomains

### Notes

PCASMSetTotalSubdomains() and PCASMSetOverlap() take precedence over PCASMSetDMSubdomains(), so setting either of the first two effectively turns the latter off.

### See Also

PCASMGetDMSubdomains(), PCASMSetTotalSubdomains(), PCASMSetOverlap()
PCASMCreateSubdomains2D(), PCASMSetLocalSubdomains(), PCASMGetLocalSubdomains()

### Level

intermediate

### Location

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