petsc-3.14.6 2021-03-30
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