petsc-3.7.7 2017-09-25

MatGetCommunicationStructs

Provides access to the communication structures used in matrix-vector multiplication.

Synopsis

#include "petscmat.h" 
#if defined(PETSC_USE_CTABLE)
PetscErrorCode  MatGetCommunicationStructs(Mat A, Vec *lvec, PetscTable *colmap, VecScatter *multScatter)
#else
PetscErrorCode  MatGetCommunicationStructs(Mat A, Vec *lvec, PetscInt *colmap[], VecScatter *multScatter)
#endif

Not Collective

Input Parameters

A -The matrix in mpiaij format

Output Parameter

	lvec	- The local vector holding off-process values from the argument to a matrix-vector product
	colmap	- A map from global column index to local index into lvec
	multScatter	- A scatter from the argument of a matrix-vector product to lvec

Level:developer
Location:src/mat/impls/aij/mpi/mpiaij.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages