MatGetOwnershipRanges#
For matrices that own values by row, excludes MATELEMENTAL and MATSCALAPACK, returns the range of matrix rows owned by each process.
Synopsis#
#include "petscmat.h"
PetscErrorCode MatGetOwnershipRanges(Mat mat, const PetscInt **ranges)
Not Collective, unless matrix has not been allocated
Input Parameter#
mat - the matrix
Output Parameter#
ranges - start of each processors portion plus one more than the total length at the end
Note#
For all matrices it returns the ranges of matrix rows associated with rows of a vector that would contain the result of a matrix vector product with this matrix. See Matrix Layouts for details on matrix layouts.
See Also#
Matrices, Mat, MatGetOwnershipRange(), MatGetOwnershipRangeColumn(), MatGetOwnershipRangesColumn(), PetscLayout
Level#
beginner
Location#
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages