PETSc version 3.17.5

PetscSFFetchAndOpWithMemTypeBegin

begin operation with explicit memory types that fetches values from root and updates atomically by applying operation using my leaf value, to be completed with PetscSFFetchAndOpEnd()

Synopsis

#include "petscsf.h" 
PetscErrorCode PetscSFFetchAndOpWithMemTypeBegin(PetscSF sf,MPI_Datatype unit,PetscMemType rootmtype,void *rootdata,PetscMemType leafmtype,const void *leafdata,PetscMemType leafupdatemtype,void *leafupdate,MPI_Op op)

Collective

Input Parameters

	sf	- star forest
	unit	- data type
	rootmtype	- memory type of rootdata
	leafmtype	- memory type of leafdata
	leafdata	- leaf values to use in reduction
	leafupdatemtype	- memory type of leafupdate
	op	- operation to use for reduction

Output Parameters

	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

Note: See PetscSFFetchAndOpBegin() for more details.

Level

advanced

Location