[Beowulf] SMP Nodes [still] Freezing w/ Scyld (follow-up, long)

Jag agrajag at dragaera.net
Wed Jan 7 16:03:07 EST 2004


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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