[Beowulf] running the Linpak -HPL benchmark.

Rahul Nabar rpnabar at gmail.com
Sun Jan 17 20:46:21 PST 2010

On Sun, Jan 17, 2010 at 8:03 PM, Gustavo Correa <gus at ldeo.columbia.edu> wrote:

> I've got Rmax/Rpeak around 84% on the cluster (AMD Opteron Shanghai, IB on a single switch).
> I didn't have the cluster available to play with HPL for too long, not too much tuning,
> I had to move to production mode.
> Some folks on mailing lists said they'd get 90%, but the topmost group in Top500 get less
> (as of mid-2009 it was ~75%, IIRR), probably because of their big networks
> with stacked switches and communication overhead.

Thanks Gus! After further tuning I am at 95% on  a single node. But
performance is falling drastically when i go multinode. Maybe because
I only have a 1 GigE network right now.


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