VecCreateGhostBlockWithArray#
Creates a parallel vector with ghost padding on each processor; the caller allocates the array space. Indices in the ghost region are based on blocks.
Synopsis#
#include "petscvec.h"
PetscErrorCode VecCreateGhostBlockWithArray(MPI_Comm comm, PetscInt bs, PetscInt n, PetscInt N, PetscInt nghost, const PetscInt ghosts[], const PetscScalar array[], Vec *vv)
Collective
Input Parameters#
comm - the MPI communicator to use
bs - block size
n - local vector length
N - global vector length (or
PETSC_DETERMINE
to have calculated ifn
is given)nghost - number of local ghost blocks
ghosts - global indices of ghost blocks (or
NULL
if not needed), counts are by block not by index, these do not need to be in increasing order (sorted)array - the space to store the vector values (as long as
n + nghost*bs
)
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
, VecCreate()
, VecGhostGetLocalForm()
, VecGhostRestoreLocalForm()
,
VecCreateGhost()
, VecCreateSeqWithArray()
, VecCreateMPIWithArray()
,
VecCreateGhostWithArray()
, VecCreateGhostBlock()
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