[Finally] Fixed in https://svn.open-mpi.org/trac/ompi/changeset/18873.
On Jul 10, 2008, at 11:29 AM, Jeff Squyres wrote:
Ya, no worries -- we're working on a fix. We're just debating
exactly *how* to fix it. See https://svn.open-mpi.org/trac/ompi/ticket/1135
if you want to keep up with the conversation.
On Jul 10, 2008, at 11:20 AM, Bogdan Costescu wrote:
On Wed, 9 Jul 2008, Ralph Castain wrote:
stdin is read twice if rank=0 shares the node with mpirun
I consider this to be a very serious regression. Many Fortran
scientific programs (at least many that I know) read their input
from stdin. This comes as a result of them being (or started to be)
written many years ago with Fortran77 for which AFAIK there is no
defined way of handling command line parameters, so reading from
stdin is a convenient and portable way to put some data into the
program as this is known to be open already and at a well known I/O
unit.
I just spent 2 days trying to understand why one such program
(CHARMM) which worked fine for many MPI implementations on many
platforms including the stable 1.2 series on this very cluster
suddenly stops in some step related to processing input. After
reading your message, everything makes sense...
Alternatively, we could ship 1.3 as-is, and warn users (similar to
1.2) that
they should avoiding reading from stdin if there is any chance
that rank=0
could be co-located with mpirun. Note that most of our clusters do
not allow
such co-location - but it is permitted by default by OMPI.
I don't know what setup your clusters have, but most that I have
seen, including all those that I admin, do run mpirun/mpiexec and
rank=0 on the same node. I really think that this will bite a lot
of people.
--
Bogdan Costescu
IWR, University of Heidelberg, INF 368, D-69120 Heidelberg, Germany
Phone: +49 6221 54 8869/8240, Fax: +49 6221 54 8868/8850
E-mail: bogdan.coste...@iwr.uni-heidelberg.de
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Jeff Squyres
Cisco Systems
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