petsc-3.14.5 2021-03-03
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# PetscLayoutCreateFromSizes

Allocates PetscLayout space, sets the layout sizes, and sets the layout up.

### Synopsis

    #include "petscis.h"
    PetscErrorCode PetscLayoutCreateFromSizes(MPI_Comm comm,PetscInt n,PetscInt N,PetscInt bs,PetscLayout *map)

Collective

### Input Parameters

| comm | - the MPI communicator
| n | - the local size (or PETSC_DECIDE)
| N | - the global size (or PETSC_DECIDE)
| bs | - the block size (or PETSC_DECIDE)

### Output Parameters

| map | - the new PetscLayout

### Notes

    PetscLayoutCreateFromSizes(comm,n,N,bs,&layout);

is a shorthand for

      PetscLayoutCreate(comm,&layout);
      PetscLayoutSetLocalSize(layout,n);
      PetscLayoutSetSize(layout,N);
      PetscLayoutSetBlockSize(layout,bs);
      PetscLayoutSetUp(layout);

### See Also

PetscLayoutCreate(), PetscLayoutSetLocalSize(), PetscLayoutSetSize(), PetscLayoutGetSize(), PetscLayoutGetLocalSize(), PetscLayout, PetscLayoutDestroy(),
PetscLayoutGetRange(), PetscLayoutGetRanges(), PetscLayoutSetBlockSize(), PetscLayoutGetBlockSize(), PetscLayoutSetUp(), PetscLayoutCreateFromRanges()

### Level

advanced

### Location

src/vec/is/utils/pmap.c
Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages