[Beowulf] Slection from processor choices; Requesting Giudence

Joe Landman landman at scalableinformatics.com
Sat Jun 17 08:56:09 EDT 2006



Greg Lindahl wrote:
> On Sat, Jun 17, 2006 at 02:36:22AM +0100, Vincent Diepeveen wrote:
> 
>> Several persons replied and not a SINGLE ONE of them talks about
>> one way pingpong latency, which is one of the most important features
>> of a highend network for *many* applications.
> 
> Actually several of them did mention it, but I guess you (and they)
> haven't seen my talk where I show some real applications where the
> rate that you can send small messages is the dominant predictor of
> performance. e.g. InfiniPath is 2X lower ping-pong latency, but can
> get much better than 2X the performance on real applications, if
> they're streaming small messages.

LAMMPS is like this.

> 
> -- greg
> 
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-- 
Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics LLC,
email: landman at scalableinformatics.com
web  : http://www.scalableinformatics.com
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