petsc-3.14.6 2021-03-30
MatMPIAdjCreateNonemptySubcommMat
create the same MPIAdj matrix on a subcommunicator containing only processes owning a positive number of rows
Synopsis
#include "petscmat.h"
PetscErrorCode MatMPIAdjCreateNonemptySubcommMat(Mat A,Mat *B)
Collective
Input Arguments
| A | - original MPIAdj matrix
|
Output Arguments
| B | - matrix on subcommunicator, NULL on ranks that owned zero rows of A
|
Note
This function is mostly useful for internal use by mesh partitioning packages that require that every process owns at least one row.
The matrix B should be destroyed with MatDestroy(). The arrays are not copied, so B should be destroyed before A is destroyed.
See Also
MatCreateMPIAdj()
Level
developer
Location
src/mat/impls/adj/mpi/mpiadj.c
Implementations
MatMPIAdjCreateNonemptySubcommMat_MPIAdj in src/mat/impls/adj/mpi/mpiadj.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages