petsc-3.13.6 2020-09-29
PetscSFReduceBegin
begin reduction of leafdata into rootdata, to be completed with call to PetscSFReduceEnd()
Synopsis
#include "petscsf.h"
PetscErrorCode PetscSFReduceBegin(PetscSF sf,MPI_Datatype unit,const void *leafdata,void *rootdata,MPI_Op op)
Collective
Input Arguments
| sf | - star forest
|
| unit | - data type
|
| leafdata | - values to reduce
|
| op | - reduction operation
|
Output Arguments
rootdata -result of reduction of values from all leaves of each root
See Also
PetscSFBcastBegin()
Level
intermediate
Location
src/vec/is/sf/interface/sf.c
Examples
src/vec/is/sf/tutorials/ex1.c.html
Implementations
PetscSFReduceBegin_Allgather in src/vec/is/sf/impls/basic/allgather/sfallgather.c
PetscSFReduceBegin_Allgatherv in src/vec/is/sf/impls/basic/allgatherv/sfallgatherv.c
PetscSFReduceBegin_Alltoall in src/vec/is/sf/impls/basic/alltoall/sfalltoall.c
PetscSFReduceBegin_Gather in src/vec/is/sf/impls/basic/gather/sfgather.c
PetscSFReduceBegin_Gatherv in src/vec/is/sf/impls/basic/gatherv/sfgatherv.c
PetscSFReduceBegin_Neighbor in src/vec/is/sf/impls/basic/neighbor/sfneighbor.c
PetscSFReduceBegin_Basic in src/vec/is/sf/impls/basic/sfbasic.c
PetscSFReduceBegin_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