[Beowulf] mpi slow pairs

Michael Di Domenico mdidomenico4 at gmail.com
Fri Aug 29 09:09:45 PDT 2014

On Fri, Aug 29, 2014 at 11:38 AM, John Hearns <John.Hearns at 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.

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