petsc-3.9.4 2018-09-11
MatGetGhosts
Get the global index of all ghost nodes defined by the sparse matrix
Synopsis
#include "petscmat.h"
PetscErrorCode MatGetGhosts(Mat mat,PetscInt *nghosts,const PetscInt *ghosts[])
Collective on Mat
Input Parameter
mat -the matrix
Output Parameters
| nghosts | - number of ghosts (note for BAIJ matrices there is one ghost for each block)
|
| ghosts | - the global indices of the ghost points
|
Notes: the nghosts and ghosts are suitable to pass into VecCreateGhost()
Level
advanced
Location
src/mat/interface/matrix.c
Implementations
MatGetGhosts_MPIAIJ in src/mat/impls/aij/mpi/mpiaij.c
MatGetGhosts_MPIBAIJ in src/mat/impls/baij/mpi/mpibaij.c
MatGetGhosts_MPISELL in src/mat/impls/sell/mpi/mpisell.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages