petsc-3.8.4 2018-03-24
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MatCreateMPIAIJSumSeqAIJ

 Creates a MATMPIAIJ matrix by adding sequential matrices from each processor

Synopsis

#include "petscmat.h" 
PetscErrorCode MatCreateMPIAIJSumSeqAIJ(MPI_Comm comm,Mat seqmat,PetscInt m,PetscInt n,MatReuse scall,Mat *mpimat)
Collective on MPI_Comm

Input Parameters

comm - the communicators the parallel matrix will live on
seqmat - the input sequential matrices
m - number of local rows (or PETSC_DECIDE)
n - number of local columns (or PETSC_DECIDE)
scall - either MAT_INITIAL_MATRIX or MAT_REUSE_MATRIX

Output Parameter

mpimat -the parallel matrix generated

Notes

The dimensions of the sequential matrix in each processor MUST be the same. The input seqmat is included into the container "Mat_Merge_SeqsToMPI", and will be destroyed when mpimat is destroyed. Call PetscObjectQuery() to access seqmat.

Level:advanced
Location:src/mat/impls/aij/mpi/mpiaij.c
Index of all Mat routines
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Index of all manual pages