#include "petscdm.h" PetscErrorCode DMLocalToGlobalBegin(DM dm,Vec l,InsertMode mode,Vec g)Neighbor-wise Collective on DM
| dm | - the DM object | |
| l | - the local vector | |
| mode | - if INSERT_VALUES then no parallel communication is used, if ADD_VALUES then all ghost points from the same base point accumulate into that base point. | |
| - the global vector | - Notes: In the ADD_VALUES case you normally would zero the receiving vector before beginning this operation. If you would like to simply add the non-ghosted values in the local array into the global array you need to either (1) zero the ghosted locations and use ADD_VALUES or (2) use INSERT_VALUES into a work global array and then add the work global array to the final global array with VecAXPY(). |
Level:beginner
Location:src/dm/interface/dm.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages