Bryan Lally wrote:
> Here's what we've found. It wasn't the platform file as such. I've
> since built with ./configure and some standard, obvious command line
> switches. What's then required is to edit the platform configuration
> file, <prefix>/etc/openmpi-mca-params.conf and add:
> coll_sync_priority = 100
> coll_sync_barrier_before = 1000
Oops. Hit send a bit before I was ready.
This has eliminated the problem on two Fedora 9 machines (8 cores and a
2 core laptop) and a 4 core Fedora 7 machine.
Thanks to all who helped get this figured out, particularly Ralph.
Bryan Lally, lally_at_[hidden]
Los Alamos National Laboratory
Los Alamos, New Mexico