PETSc version 3.17.4
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
src/dm/impls/patch/patch.c
Index of all DMPATCH routines
Table of Contents for all manual pages
Index of all manual pages