[Beowulf] Correct networking solution for 16-core nodes

[Joachim Worringen]

Greg Lindahl wrote:
> Vincent wrote:
> 
>> Only quadrics is clear about its switch latency (probably
>> competitors have a worse one). It's 50 us for 1 card.
> 
> We have clearly stated that the Mellanox switch is around 200 usec per
> hop.  Myricom's number is also well known.

I think Vincent meant another latency, not the per-hop latency in the 
switches: the time to switch between different processes communicating 
to the NIC. I never heard of this latency being specified, nor being 
substantial. Can anybody comment?

  Joachim

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Joachim Worringen, Software Architect, Dolphin Interconnect Solutions
phone ++49/(0)228/324 08 17 - http://www.dolphinics.com