DMLocalToLocalBegin

Begins the process of mapping values from a local vector (that include ghost points that contain irrelevant values) to another local vector where the ghost points in the second are set correctly from values on other MPI ranks.

Synopsis

#include "petscdm.h"          
#include "petscdmlabel.h"     
#include "petscds.h"     
PetscErrorCode DMLocalToLocalBegin(DM dm, Vec g, InsertMode mode, Vec l)

Neighbor-wise Collective

Input Parameters

• dm - the DM object

• g - the original local vector

• mode - one of INSERT_VALUES or ADD_VALUES

Output Parameter

• l - the local vector with correct ghost values

Notes

Must be followed by DMLocalToLocalEnd().

See Also

DM Basics, DM, DMLocalToLocalEnd(), DMCoarsen(), DMDestroy(), DMView(), DMCreateLocalVector(), DMCreateGlobalVector(), DMCreateInterpolation(), DMGlobalToLocalEnd(), DMLocalToGlobalBegin()

Level

intermediate

Location

src/dm/interface/dm.c

Implementations

DMLocalToLocalBegin_Composite() in src/dm/impls/composite/pack.c
DMLocalToLocalBegin_DA() in src/dm/impls/da/daltol.c

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