DMGetBlockSize#

Gets the inherent block size associated with a DM

Synopsis#

#include "petscdm.h"          
#include "petscdmlabel.h"     
#include "petscds.h"     
PetscErrorCode DMGetBlockSize(DM dm, PetscInt *bs)

Not Collective

Input Parameter#

  • dm - the DM with block structure

Output Parameter#

  • bs - the block size, 1 implies no exploitable block structure

Notes#

This might be the number of degrees of freedom at each grid point for a structured grid.

Complex DM that represent multiphysics or staggered grids or mixed-methods do not generally have a single inherent block size, but rather different locations in the vectors may have a different block size.

See Also#

DM Basics, DM, ISCreateBlock(), VecSetBlockSize(), MatSetBlockSize(), DMGetLocalToGlobalMapping()

Level#

intermediate

Location#

src/dm/interface/dm.c

Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages