MatMPIAdjToSeqRankZero#
Converts an parallel MATMPIADJ matrix to complete MATMPIADJ on rank zero (needed by sequential partitioner)
Synopsis#
#include "petscmat.h"
PetscErrorCode MatMPIAdjToSeqRankZero(Mat A, Mat *B)
Logically Collective
Input Parameter#
A - the matrix
Output Parameter#
B - the same matrix on rank zero, not set on other ranks
Note#
This routine has the advantage on systems with multiple ranks per node since only one copy of the matrix is stored on the first node, instead of the number of ranks copies. This can allow partitioning much larger parallel graph sequentially.
See Also#
Matrices, Mat, MATMPIADJ, MatCreate(), MatCreateMPIAdj(), MatSetValues(), MatMPIAdjToSeq()
Level#
intermediate
Location#
Implementations#
MatMPIAdjToSeqRankZero_MPIAdj() in src/mat/impls/adj/mpi/mpiadj.c
Index of all Mat routines
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Index of all manual pages