petsc-master 2018-04-19
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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