On Fri, Aug 29, 2014 at 3:26 PM, Håkon Bugge <h-bu...@online.no> wrote: > Hmm, are all pairs going through the spine? If not, look up the parking-lot > problem. Håkon
i believe all the pairs do pass through a spine. i'm not familiar with the "parking-lot problem", i'll google it, but suspect a bazillion hits will come back > Sendt fra min HTC > > ----- Reply message ----- > Fra: "Michael Di Domenico" <mdidomeni...@gmail.com> > Til: "Beowulf Mailing List" <Beowulf@beowulf.org> > Emne: [Beowulf] mpi slow pairs > Dato: fre., aug. 29, 2014 18:09 > > > > On Fri, Aug 29, 2014 at 11:38 AM, John Hearns <john.hea...@viglen.co.uk> > wrote: >>> Also have you run ibdiagnet to see if anything is flagged up? >> >> i've run a multitude of ib diags on the machines, but nothing is popping >> out as wrong. what's weird is that it's only certain pairing of machines >> not any one machine in general. >> >> Would that then be a problem in one of the blades or a part of the switch? > > not sure yet, i think on the spine modules in the switch is silently > failing to send traffic a full speed, but i've not been able to > "prove" this yet. > _______________________________________________ > 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 _______________________________________________ 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
