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

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

Examples#

src/dm/tutorials/ex25.c

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Index of all DMPatch routines
Table of Contents for all manual pages
Index of all manual pages