MatCreateMPIAIJWithSeqAIJ

creates a MATMPIAIJ matrix using MATSEQAIJ matrices that contain the “diagonal” and “off-diagonal” part of the matrix in CSR format.

Synopsis

#include "petscmat.h" 
PetscErrorCode MatCreateMPIAIJWithSeqAIJ(MPI_Comm comm, PetscInt M, PetscInt N, Mat A, Mat B, PetscInt *garray, Mat *mat)

Collective

Input Parameters

• comm - MPI communicator

• M - the global row size

• N - the global column size

• A - “diagonal” portion of matrix

• B - if garray is NULL, B should be the offdiag matrix using global col ids and of size N - if garray is not NULL, B should be the offdiag matrix using local col ids and of size garray

• garray - either NULL or the global index of B columns

Output Parameter

• mat - the matrix, with input A as its local diagonal matrix

Notes

See MatCreateAIJ() for the definition of “diagonal” and “off-diagonal” portion of the matrix.

A and B becomes part of output mat. The user cannot use A and B anymore.

See Also

Matrices, Mat, MATMPIAIJ, MATSEQAIJ, MatCreateMPIAIJWithSplitArrays()

Level

advanced

Location

src/mat/impls/aij/mpi/mpiaij.c

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