PetscCommSplitReductionBegin#
Begin an asynchronous split-mode reduction
Synopsis#
#include "petscvec.h"
PetscErrorCode PetscCommSplitReductionBegin(MPI_Comm comm)
Collective but not synchronizing
Input Parameter#
comm - communicator on which split reduction has been queued
Note#
Calling this function is optional when using split-mode reduction. On supporting hardware, calling this after all VecXxxBegin() allows the reduction to make asynchronous progress before the result is needed (in VecXxxEnd()).
See Also#
VecNormBegin(), VecNormEnd(), VecDotBegin(), VecDotEnd(), VecTDotBegin(), VecTDotEnd(), VecMDotBegin(), VecMDotEnd(), VecMTDotBegin(), VecMTDotEnd()
Level#
advanced
Location#
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages