VecCreateGhostBlock#
Creates a parallel vector with ghost padding on each processor. The indicing of the ghost points is done with blocks.
Synopsis#
#include "petscvec.h"
PetscErrorCode VecCreateGhostBlock(MPI_Comm comm, PetscInt bs, PetscInt n, PetscInt N, PetscInt nghost, const PetscInt ghosts[], Vec *vv)
Collective
Input Parameters#
comm - the MPI communicator to use
bs - the block size
n - local vector length
N - global vector length (or
PETSC_DETERMINEto have calculated ifnis given)nghost - number of local ghost blocks
ghosts - global indices of ghost blocks, counts are by block, not by individual index, 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.
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
See Also#
Vectors and Parallel Data, Vec, VecType, VecCreateSeq(), VecCreate(), VecDuplicate(), VecDuplicateVecs(), VecCreateMPI(),
VecGhostGetLocalForm(), VecGhostRestoreLocalForm(),
VecCreateGhostWithArray(), VecCreateMPIWithArray(), VecCreateGhostBlockWithArray()
Level#
advanced
Location#
Examples#
src/vec/vec/tutorials/ex14f.F90
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages