[mpich-discuss] Why do predefined MPI_Ops function elementwise in MPI_Accumulate, but not in MPI-1 routines?

[Jed Brown]

On Tue, Apr 24, 2012 at 14:09, Dave Goodell <goodell at mcs.anl.gov> wrote:

> Winking-face aside, the solution that I think you really want must come
> from the MPI Forum, not MPICH2.  Even if we (MPICH2) choose to support the
> extensions of (a), (b), and/or (c), you'll still be missing them when you
> use a non-MPICH2 MPI implementation.  And I wouldn't be surprised if some
> downstream vendors objected to (a) and wouldn't support it because of an
> implementation impact.


Yeah, I'm aware of this. I'm under the impression that Torsten, Jeff, and
others have advocated (a) at the Forum in the past, and that it has not yet
been accepted or rejected.
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