Uhmmm, what is "MPI_Free()"?
he probably meant MPI_Request_free
(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.
I've never even seen these MPI_Start-related interfaces in use,
but MPI_Request_free appears to be callable once per MPI_*_Init.
that would argue for pairing as in the first sequence.
afaikt, the point of the interface is actually init/start+/free -
that is, you set up a persistent send and kick it into action
many times. but only free it once.
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