[Beowulf] many cores and ib

Gilad Shainer Shainer at mellanox.com
Mon May 5 16:42:49 EDT 2008


 

> -----Original Message-----
> From: beowulf-bounces at beowulf.org 
> [mailto:beowulf-bounces at beowulf.org] On Behalf Of Greg Lindahl
> Sent: Monday, May 05, 2008 1:33 PM
> To: beowulf at beowulf.org
> Subject: Re: [Beowulf] many cores and ib
> 
> On Mon, May 05, 2008 at 10:01:42AM -0700, Gilad Shainer wrote:
> 
> > According to OSU benchmarks, InfiniHost III Ex provides >20M MPI 
> > message per second.
> 
> And we should all remember that this test result uses message 
> coalescing, which in real life will not help many-core nodes 
> talking to lots of other nodes. It only helps 2 nodes talking 
> to only each other.
> 
> I mean, you'd hate to mislead your customers about the 
> performance of your HCA, right? Still, you should be 
> applauded for not only using latency and bandwidth.
> 
> -- greg
> 


It is the same benchmark that QLogic were and are using for MPI message
rate, and I guess you know that better then me, don't you?....  I want
to make sure when one do a comparison he/she will be using the same
benchmark/output to compare. 


Gilad. 

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