MatMPIBAIJGetSeqBAIJ#

Get the on-process (diagonal block) and off-process (off-diagonal block) sequential matrices that make up a MATMPIBAIJ or MATMPISBAIJ matrix, together with the local-to-global column map for the off-diagonal block.

Synopsis#

#include "petscmat.h"  
PetscErrorCode MatMPIBAIJGetSeqBAIJ(Mat A, Mat *Ad, Mat *Ao, const PetscInt *colmap[])

Not Collective

Input Parameter#

A - the MATMPIBAIJ or MATMPISBAIJ matrix

Output Parameters#

Ad - the diagonal block (MATSEQBAIJ or MATSEQSBAIJ), or NULL if not needed
Ao - the off-diagonal block MATSEQBAIJ, or NULL if not needed
colmap - the local-to-global column index map for Ao, or NULL if not needed

Level#

advanced

Location#

src/mat/impls/baij/mpi/mpibaij.c

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