PetscLayoutCreate

Synopsis

#include "petscis.h" 
PetscErrorCode PetscLayoutCreate(MPI_Comm comm,PetscLayout *map)

Input Parameters

Output Parameters

Notes

       PetscLayoutCreate(MPI_Comm,PetscLayout *);
       PetscLayoutSetBlockSize(PetscLayout,bs);
       PetscLayoutSetSize(PetscLayout,N); // or PetscLayoutSetLocalSize(PetscLayout,n);
       PetscLayoutSetUp(PetscLayout);

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

Optionally use any of the following

  PetscLayoutGetSize(PetscLayout,PetscInt *);
  PetscLayoutGetLocalSize(PetscLayout,PetscInt *);
  PetscLayoutGetRange(PetscLayout,PetscInt *rstart,PetscInt *rend);
  PetscLayoutGetRanges(PetscLayout,const PetscInt *range[]);
  PetscLayoutDestroy(PetscLayout*);

The PetscLayout object and methods are intended to be used in the PETSc Vec and Mat implementations; it is often not needed in user codes unless you really gain something in their use.

See Also

Level

Location