petsc-3.14.6 2021-03-30
ISSetBlockSize
informs an index set that it has a given block size
Synopsis
#include "petscis.h"
PetscErrorCode ISSetBlockSize(IS is,PetscInt bs)
Logicall Collective on IS
Input Arguments
| is | - index set
|
| bs | - block size
|
Notes
This is much like the block size for Vecs. It indicates that one can think of the indices as
being in a collection of equal size blocks. For ISBlock() these collections of blocks are all contiquous
within a block but this is not the case for other IS.
ISBlockGetIndices() only works for ISBlock IS, not others.
See Also
ISGetBlockSize(), ISCreateBlock(), ISBlockGetIndices(),
Level
intermediate
Location
src/vec/is/is/interface/index.c
Examples
src/ksp/ksp/tutorials/ex49.c.html
src/ksp/ksp/tutorials/ex73.c.html
Implementations
ISSetBlockSize_Block in src/vec/is/is/impls/block/block.c
ISSetBlockSize_General in src/vec/is/is/impls/general/general.c
ISSetBlockSize_Stride in src/vec/is/is/impls/stride/stride.c
Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages