PetscLayoutSetUp — PETSc 3.21.4 documentation

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# PetscLayoutSetUp

given a map where you have set either the global or local size sets up the map so that it may be used.

## Synopsis

    #include "petscis.h"
    PetscErrorCode PetscLayoutSetUp(PetscLayout map)

Collective

## Input Parameter

- map - pointer to the map

## Notes

Typical calling sequence

      PetscLayoutCreate(MPI_Comm,PetscLayout *);
      PetscLayoutSetBlockSize(PetscLayout,1);
      PetscLayoutSetSize(PetscLayout,n) or PetscLayoutSetLocalSize(PetscLayout,N); or both
      PetscLayoutSetUp(PetscLayout);
      PetscLayoutGetSize(PetscLayout,PetscInt *);

If range exists, and local size is not set, everything gets computed from the range.

If the local size, global size are already set and range exists then this does nothing.

## See Also

PetscLayout, `PetscLayoutSetLocalSize()`, `PetscLayoutSetSize()`, `PetscLayoutGetSize()`, `PetscLayoutGetLocalSize()`, `PetscLayout`, `PetscLayoutDestroy()`, `PetscLayoutGetRange()`, `PetscLayoutGetRanges()`, `PetscLayoutSetBlockSize()`, `PetscLayoutGetBlockSize()`, `PetscLayoutCreate()`, `PetscSplitOwnership()`

## Level

developer

## Location

src/vec/is/utils/pmap.c

## Examples

src/ksp/ksp/tutorials/ex85.c

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