VecCreateGhostBlock
Creates a parallel vector with ghost padding on each processor. The indicing of the ghost points is done with blocks.
Synopsis
#include "vec.h"
int VecCreateGhostBlock(MPI_Comm comm,int bs,int n,int N,int nghost,const int ghosts[],Vec *vv)
Collective on MPI_Comm
Input Parameters
| comm | - the MPI communicator to use
|
| bs | - the block size
|
| n | - local vector length
|
| N | - global vector length (or PETSC_DECIDE to have calculated if n is given)
|
| nghost | - number of local ghost blocks
|
| ghosts | - global indices of ghost blocks
|
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.
n is the local vector size (total local size not the number of blocks) while nghost
is the number of blocks in the ghost portion, i.e. the number of elements in the ghost
portion is bs*nghost
Keywords
vector, create, MPI, ghost points, ghost padding
See Also
VecCreateSeq(), VecCreate(), VecDuplicate(), VecDuplicateVecs(), VecCreateMPI(),
VecGhostGetLocalForm(), VecGhostRestoreLocalForm(),
VecCreateGhostWithArray(), VecCreateMPIWithArray(), VecCreateGhostBlockWithArray()
Examples
src/vec/examples/tutorials/ex14f.F
Level:advanced
Location:src/vec/impls/mpi/pbvec.c
Vector Index
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