DMCreateDomainDecomposition#
Returns lists of IS objects defining a decomposition of a problem into subproblems corresponding to restrictions to pairs of nested subdomains.
Synopsis#
#include "petscdm.h"
#include "petscdmlabel.h"
#include "petscds.h"
PetscErrorCode DMCreateDomainDecomposition(DM dm, PetscInt *n, char ***namelist, IS **innerislist, IS **outerislist, DM **dmlist)
Not Collective
Input Parameter#
dm - the
DMobject
Output Parameters#
n - The number of subproblems in the domain decomposition (or
NULLif not requested)namelist - The name for each subdomain (or
NULLif not requested)innerislist - The global indices for each inner subdomain (or NULL, if not requested)
outerislist - The global indices for each outer subdomain (or NULL, if not requested)
dmlist - The
DMs for each subdomain subproblem (or NULL, if not requested; ifNULLis returned, noDMs are defined)
Note#
Each IS contains the global indices of the dofs of the corresponding subdomains with in the
dofs of the original DM. The inner subdomains conceptually define a nonoverlapping
covering, while outer subdomains can overlap.
The optional list of DMs define a DM for each subproblem.
The user is responsible for freeing all requested arrays. In particular, every entry of names should be freed with
PetscFree(), every entry of is should be destroyed with ISDestroy(), every entry of dm should be destroyed with DMDestroy(),
and all of the arrays should be freed with PetscFree().
Developer Notes#
The dmlist is for the inner subdomains or the outer subdomains or all subdomains?
See Also#
DM Basics, DM, DMCreateFieldDecomposition(), DMDestroy(), DMCreateDomainDecompositionScatters(), DMView(), DMCreateInterpolation(), DMCreateColoring(), DMCreateMatrix(), DMCreateMassMatrix()
Level#
intermediate
Location#
Examples#
Implementations#
DMCreateDomainDecomposition_DA() in src/dm/impls/da/dadd.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages