DMDAGetProcessorSubsets#
Returns communicators consisting only of the processors in a DMDA adjacent in a particular dimension, corresponding to a logical plane in a 3D grid or a line in a 2D grid.
Synopsis#
#include "petscdmda.h"
PetscErrorCode DMDAGetProcessorSubsets(DM da, DMDirection dir, MPI_Comm *subcomm)
Collective on da
Input Parameters#
da - the distributed array
dir - Cartesian direction, either DM_X, DM_Y, or DM_Z
Output Parameter#
subcomm - new communicator
Notes#
This routine is useful for distributing one-dimensional data in a tensor product grid.
After use, comm should be freed with MPI_Comm_free()
Not supported from Fortran
Level#
advanced
Location#
Examples#
Index of all DMDA routines
Table of Contents for all manual pages
Index of all manual pages