On Mar 13, 2014, at 2:00 PM, Jeff Hammond <[email protected]> wrote:

Do you think a user can determine from MPI-3 that it is an erroneous program to have accumulate to same loc with diff ops using _reasonable_ effort?

I’m not arguing as to whether it is convenient for the user. I’m just stating that the standard disallows it. IIRC, it was the explicit intention of the WG to disallow it, because we thought MPI-2 disallowed it as well (which was a mistake). — Pavan