Hi all,
I observed MPI_ISEND & IRECV performing little better than persistenent
communication; although I was hoping/desiring the opposite case??
What is the be the best way of using MPI persistent communication in an
iterative/repetative kind of code about calling MPI_Free(); Should we call
MPI_Free() in every iteration or
only once when all the iterations/repetitions are performed?
Means which one is the best out of following two:
(1)
Call this subroutines 1000 times
=============================
call MPI_RECV_Init()
call MPI_Send_Init()
call MPI_Startall()
call MPI_Free()
=============================
(2)
Call this subroutines 1000 times
===========================
call MPI_RECV_Init()
call MPI_Send_Init()
call MPI_Startall()
==========================
call MPI_Free() --------- call it only once at the end.
Thanks in advance.
best regards
AA
