MatStashSetInitialSize#
sets the sizes of the matrix stash, that is used during the assembly process to store values that belong to other processors.
Synopsis#
#include "petscmat.h"
PetscErrorCode MatStashSetInitialSize(Mat mat, PetscInt size, PetscInt bsize)
Not Collective
Input Parameters#
mat - the matrix
size - the initial size of the stash.
bsize - the initial size of the block-stash(if used).
Options Database Keys#
-matstash_initial_size
or <size0,size1,…sizep- 1> - set initial size-matstash_block_initial_size
or <bsize0,bsize1,…bsizep- 1> - set initial block size
Notes#
The block-stash is used for values set with MatSetValuesBlocked() while
the stash is used for values set with MatSetValues()
Run with the option -info and look for output of the form MatAssemblyBegin_MPIXXX:Stash has MM entries, uses nn mallocs. to determine the appropriate value, MM, to use for size and MatAssemblyBegin_MPIXXX:Block-Stash has BMM entries, uses nn mallocs. to determine the value, BMM to use for bsize
See Also#
Matrices, MatAssemblyBegin(), MatAssemblyEnd(), Mat, MatStashGetInfo()
Level#
intermediate
Location#
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages