DMSetMatrixPreallocateOnly#
When DMCreateMatrix()
is called the matrix will be properly preallocated but the nonzero structure and zero values will not be set.
Synopsis#
#include "petscdm.h"
#include "petscdmlabel.h"
#include "petscds.h"
PetscErrorCode DMSetMatrixPreallocateOnly(DM dm, PetscBool only)
Logically Collective
Input Parameters#
dm - the
DM
only -
PETSC_TRUE
if only want preallocation
Options Database Key#
-dm_preallocate_only - Only preallocate the matrix for
DMCreateMatrix()
,DMCreateMassMatrix()
, but do not fill it with zeros
See Also#
DM Basics, DM
, DMCreateMatrix()
, DMCreateMassMatrix()
, DMSetMatrixStructureOnly()
, DMSetMatrixPreallocateSkip()
Level#
developer
Location#
Examples#
src/dm/impls/stag/tutorials/ex8.c
src/tao/unconstrained/tutorials/burgers_spectral.c
src/tao/unconstrained/tutorials/spectraladjointassimilation.c
src/ts/tutorials/ex50.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages