PetscSFReduceEnd#

end a reduction operation started with PetscSFReduceBegin() or PetscSFReduceWithMemTypeBegin()

Synopsis#

#include "petscsf.h" 
PetscErrorCode PetscSFReduceEnd(PetscSF sf, MPI_Datatype unit, const void *leafdata, void *rootdata, MPI_Op op)

Collective

Input Parameters#

  • sf - star forest

  • unit - data type

  • leafdata - values to reduce

  • op - reduction operation

Output Parameter#

  • rootdata - result of reduction of values from all leaves of each root

See Also#

PetscSF, PetscSFSetGraph(), PetscSFBcastEnd(), PetscSFReduceBegin(), PetscSFReduceWithMemTypeBegin()

Level#

intermediate

Location#

src/vec/is/sf/interface/sf.c

Examples#

src/vec/is/sf/tutorials/ex1f.F90
src/vec/is/sf/tutorials/ex1.c
src/ts/tutorials/ex30.c

Implementations#

PetscSFReduceEnd_Allgatherv() in src/vec/is/sf/impls/basic/allgatherv/sfallgatherv.c
PetscSFReduceEnd_Basic() in src/vec/is/sf/impls/basic/sfbasic.c
PetscSFReduceEnd_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