petsc-3.13.6 2020-09-29
DMGetNeighbors
Gets an array containing the MPI rank of all the processes neighbors
Synopsis
#include "petscdm.h"
#include "petscdmlabel.h"
#include "petscds.h"
PetscErrorCode DMGetNeighbors(DM dm,PetscInt *nranks,const PetscMPIInt *ranks[])
Not Collective
Input Parameter
dm -The DM
Output Parameters
| nranks | - the number of neighbours
|
| ranks | - the neighbors ranks
|
Notes
Do not free the array, it is freed when the DM is destroyed.
.seealso: DMDAGetNeighbors(), PetscSFGetRootRanks()
Level
beginner
Location
src/dm/interface/dm.c
Examples
src/dm/tutorials/swarm_ex3.c.html
Implementations
DMGetNeighbors_DA in src/dm/impls/da/dacreate.c
DMGetNeighbors_Plex in src/dm/impls/plex/plexcreate.c
DMGetNeighbors_Stag in src/dm/impls/stag/stag.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages