DMSetMatrixPreallocateSkip

When DMCreateMatrix() is called the matrix sizes and ISLocalToGlobalMapping will be properly set, but the data structures to store values in the matrices will not be preallocated. This is most useful to reduce initialization costs when MatSetPreallocationCOO() and MatSetValuesCOO() will be used.

Synopsis

#include "petscdm.h"          
#include "petscdmlabel.h"     
#include "petscds.h"     
PetscErrorCode DMSetMatrixPreallocateSkip(DM dm, PetscBool skip)

Logically Collective

Input Parameters

• dm - the DM

• skip - PETSC_TRUE to skip preallocation

See Also

DM Basics, DM, DMCreateMatrix(), DMSetMatrixStructureOnly(), DMSetMatrixPreallocateOnly()

Level

developer

Location

src/dm/interface/dm.c

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