> > I have been using single card on Magny-Cours with no issues at all. > You can > > interesting. what adjustments have you made to the MPI stack to permit > this? > we've had a variety of apps that fail intermittently on high-core > nodes. > I have to say I was surprised such a thing came up - not sure whether > it's > inherent to IB or a result of the openmpi stack. our usual way to test > this is to gradually reduce the ranks-per-node for the job until it > starts > to work. an interesting cosmology code works at 1 pppn but not 3 ppn > on our recent 12c MC, mellanox QDR cluster.
I will be more than happy to give it a try - have access to the Magny-Cours system at http://www.hpcadvisorycouncil.com/cluster_center.php > > regards, mark hahn. > _______________________________________________ _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
