[Beowulf] SMP Nodes [still] Freezing w/ Scyld (follow-up, long)
Timothy R. Whitcomb
twhitcomb at apl.washington.edu
Wed Jan 7 16:11:23 EST 2004
No, I'm not using myrinet. It's a Scyld 28cz4 with 100BaseT
interconnects, dual-processor Tyan AMD boards.
On Wed, 7 Jan 2004, Jag wrote:
> On Wed, 2004-01-07 at 15:32, Timothy R. Whitcomb wrote:
> > First of all, thanks to everyone who responded to my first message. I
> > received many helpful suggestions to test, which I have documented
> > here.
> > As a quick review of my (still unsolved) situation, we are running a
> > weather model on a 5-node, 10-processor Scyld Beowulf cluster. As
> > long as we use a single processor per machine, performance is fine -
> > but when we use both processors on a single node then the node freezes
> > after a variable length of time (sometimes minutes, sometimes hours).
> Unfortunately I missed your first post. Are you using myrinet? I seem
> to recall some past problems with two MPI jobs on one host running myri
> on Scyld systems.
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