VecGhostUpdateBegin#

Begins the vector scatter to update the vector from local representation to global or global representation to local.

Synopsis#

#include "petscvec.h"   
PetscErrorCode VecGhostUpdateBegin(Vec g, InsertMode insertmode, ScatterMode scattermode)

Neighbor-wise Collective

Input Parameters#

Notes#

Use the following to update the ghost regions with correct values from the owning process

Use the following to accumulate the ghost region values onto the owning processors

To accumulate the ghost region values onto the owning processors and then update the ghost regions correctly, call the latter followed by the former, i.e.,

See Also#

Vectors and Parallel Data, Vec, VecType, VecCreateGhost(), VecGhostUpdateEnd(), VecGhostGetLocalForm(), VecGhostRestoreLocalForm(), VecCreateGhostWithArray()

Level#

advanced

Location#

src/vec/vec/impls/mpi/commonmpvec.c

Examples#

src/vec/vec/tutorials/ex14f.F90
src/vec/vec/tutorials/ex9f.F90
src/vec/vec/tutorials/ex9.c


Index of all Vec routines
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Index of all manual pages