[Pkg-openmpi-maintainers] preferred MPI: openmpi or mpich?

[Michael Banck]

Hi,

On Fri, Jul 07, 2017 at 06:15:28PM +0800, Drew Parsons wrote:
> On Fri, 2017-07-07 at 11:47 +0200, Michael Banck wrote:
> > We (Debichem) also have a few upstreams that claim OpenMPI is more
> > buggy
> > than MPICH.
> 
> Interesting.  Can you check in with them to see whether they still
> think that's the case, or was that poor experience with older OpenMPI
> versions?

Well, I think it is more a general feeling towards the
MPI_THREAD_MULTIPLE issues that plagued OpenMPI for a long time and
nobody at OpenMPI seemed to take serious.

See e.g. https://github.com/ValeevGroup/tiledarray which references
https://github.com/open-mpi/ompi/issues/157 (since closed) or
https://github.com/nubakery/bagel/issues/8#issuecomment-32286225 or
https://github.com/jeffhammond/armci-mpi#status

All of those might be obsolete, but it might be difficult to get
everybody to validate their codes on OpenMPI again.


Michael