petsc-3.13.6 2020-09-29
VecCreateGhost
Creates a parallel vector with ghost padding on each processor.
Synopsis
#include "petscvec.h"
PetscErrorCode VecCreateGhost(MPI_Comm comm,PetscInt n,PetscInt N,PetscInt nghost,const PetscInt ghosts[],Vec *vv)
Collective
Input Parameters
| comm | - the MPI communicator to use
|
| n | - local vector length
|
| N | - global vector length (or PETSC_DECIDE to have calculated if n is given)
|
| nghost | - number of local ghost points
|
| ghosts | - global indices of ghost points, these do not need to be in increasing order (sorted)
|
Output Parameter
vv -the global vector representation (without ghost points as part of vector)
Notes
Use VecGhostGetLocalForm() to access the local, ghosted representation
of the vector.
This also automatically sets the ISLocalToGlobalMapping() for this vector.
See Also
VecCreateSeq(), VecCreate(), VecDuplicate(), VecDuplicateVecs(), VecCreateMPI(),
VecGhostGetLocalForm(), VecGhostRestoreLocalForm(), VecGhostUpdateBegin(),
VecCreateGhostWithArray(), VecCreateMPIWithArray(), VecGhostUpdateEnd(),
VecCreateGhostBlock(), VecCreateGhostBlockWithArray(), VecMPISetGhost()
Level
advanced
Location
src/vec/vec/impls/mpi/pbvec.c
Examples
src/vec/vec/tutorials/ex9.c.html
src/vec/vec/tutorials/ex9f.F90.html
src/vec/vec/tutorials/ex14f.F90.html
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages