DMPatchZoom#
Create patches of a DMDA on subsets of processes, indicated by commz
Synopsis#
#include "petscdmpatch.h"
PetscErrorCode DMPatchZoom(DM dm, MatStencil lower, MatStencil upper, MPI_Comm commz, DM *dmz, PetscSF *sfz, PetscSF *sfzr)
Collective on dm
Input Parameters#
dm - the DM
lower - the lower left corner of the requested patch
upper - the upper right corner of the requested patch
commz - the new communicator for the patch, MPI_COMM_NULL indicates that the given rank will not own a patch
Output Parameters#
dmz - the patch DM
sfz - the PetscSF mapping the patch+halo to the zoomed version (optional)
sfzr - the PetscSF mapping the patch to the restricted zoomed version
See Also#
DMPatchSolve()
, DMDACreatePatchIS()
Level#
intermediate
Location#
Examples#
Index of all DMPatch routines
Table of Contents for all manual pages
Index of all manual pages