PetscSFFetchAndOpEnd
end operation started in matching call to PetscSFFetchAndOpBegin() to fetch values from roots and update atomically by applying operation using my leaf value
Synopsis
#include "petscsf.h"
PetscErrorCode PetscSFFetchAndOpEnd(PetscSF sf,MPI_Datatype unit,void *rootdata,const void *leafdata,void *leafupdate,MPI_Op op)
Collective
Input Arguments
| sf | - star forest
|
| unit | - data type
|
| leafdata | - leaf values to use in reduction
|
| op | - operation to use for reduction
|
Output Arguments
| rootdata | - root values to be updated, input state is seen by first process to perform an update
|
| leafupdate | - state at each leaf's respective root immediately prior to my atomic update
|
See Also
PetscSFComputeDegreeEnd(), PetscSFReduceEnd(), PetscSFSetGraph()
Level
advanced
Location
src/vec/is/sf/interface/sf.c
Examples
src/vec/is/sf/tutorials/ex1.c.html
Implementations
PetscSFFetchAndOpEnd_Allgatherv in src/vec/is/sf/impls/basic/allgatherv/sfallgatherv.c
PetscSFFetchAndOpEnd_Neighbor in src/vec/is/sf/impls/basic/neighbor/sfneighbor.c
PetscSFFetchAndOpEnd_Basic in src/vec/is/sf/impls/basic/sfbasic.c
PetscSFFetchAndOpEnd_Window in src/vec/is/sf/impls/window/sfwindow.c
Index of all PetscSF routines
Table of Contents for all manual pages
Index of all manual pages