PETSc version 3.16.6
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,upper - the upper right corner and the lower left 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
src/dm/impls/patch/patch.c
Index of all DMPATCH routines
Table of Contents for all manual pages
Index of all manual pages