petsc-master 2020-01-26
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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/examples/tutorials/ex49.c.html
src/ksp/ksp/examples/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