[Beowulf] HPL efficiency on Magny-Cours and Westmere?

[Roger L. Smith]

We achieved ~87% on HPL across 3072 cores (256 nodes) with QDR IB and 2GB/core. 
  If I remember correctly, we got about 91% on a single node (across 12 cores).
We didn't run single-socket tests.

This is on an IBM iDataPlex with 2.8GHz X5660 Westmeres.

Mark Hahn wrote:
> Hi all,
> can anyone tell me what kind of efficiency you're seeing on Magny-Cours
> and Westmere systems?  by efficiency, I mean actual HPL performance as a
> fraction of cores * clock * 4 flops/cycle.  I realize some of this can 
> be drived from top500 results, but I'd also be be interested in single-
> socket and single-node scores for comparison.
> 
> thanks, mark hahn.
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-- 
Roger L. Smith
Senior Systems Administrator
Mississippi State University
High Performance Computing Collaboratory