[Beowulf] evaluating FLOPS capacity of our cluster

John Hearns hearnsj at googlemail.com
Mon May 11 15:59:56 EDT 2009


2009/5/11 Mark Hahn <hahn at mcmaster.ca>:
>>> Excellent. Thanks Gus. That sort of estimate is exactly what I needed.
>>> I do have AMD Athelons.
>
> right - for PHB's, peak theoretical throughput is a reasonable approach,
> especially since it doesn't require any real work on your part.  the only
> real magic is to find the flops-per-cycle multiplier for your cpus.
> basically, anything introduced since core2 has been 4 f/c (incl core2).
> before that, only ia64 was 4 f/c.  as others have mentioned, the ">= core2
> generation" includes AMD barcelona/shanghai/etc versions (server and
> desktop), as well as nehalem on the intel side.

Agreeing with what Mark says. I had to look this up recently - 4
floating point operations/clock cycle on IA64, 4 for recent Opterons
and Xeons.

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