See the mail below from the OpenMPI maintainers.
This would mean our options are:
(1) Drop MPI for 32-bit archs.
(2) Use MPICH for 32-bit archs, OpenMPI for 64 bit
(3) Use MPICH for everything.
My experience is that OpenMPI is more mature for new fabrics, etc
(UCX) - I wasn't able to get UCX to work with MPICH in time for
Bullseye, so I'm not favouring (3). I'd rather not drop MPI for 32-bit
systems in general - while I don't expect proper HPC to run on these,
its one of the simplest ways of adding parallelism, and there will be
systems with large numbers of 32-bit cores.
What are peoples opinions ?
Best regards
Alastair
-------- Forwarded Message --------
Subject: Dropping Open MPI 32 bit support
Date: Thu, 11 Mar 2021 16:11:45 +0000
From: Jeff Squyres (jsquyres) <[email protected]>
To: Alastair McKinstry <[email protected]>
CC: Gilles Gouaillardet <[email protected]>
Alastair --
We're seriously talking about dropping 32 bit support starting with Open
MPI v5.0.0:
https://www.mail-archive.com/[email protected]/msg00055.html
Would that be a problem for Debain?
--
Jeff Squyres
[email protected]
