[Beowulf] Slection from processor choices; Requesting Giudence
gdjacobs at gmail.com
Sat Jun 17 08:57:03 PDT 2006
Mark Hahn wrote:
>> GigE is not perfect. My point is that for many applications
>> it can work well.
> for many apps of certain job sizes...
>> desktop (32 bit PCI) cards. I managed to get 14.6 HPL GFLOPS
>> and 4.35 GROMACS GFLOPS out of 8 nodes consisting of hardware
>> As a point of reference, a quad opteron 270 (2GHz) reported
>> 4.31 GROMACS GFLOPS.
> that's perplexing to me, since the first cluster has semp/2500's,
> right? that's a 1.75 GHz K8 core with 128K L2 and 64b memory
> interface. versus the same number of 2.0 GHz, 1M cores each with
> 4x 128b memory. I really wouldn't expect them to be that close -
> any speculation on why GROMACS runs so poorly on the much better
> SMP machine?
<googling for motherboard specs>
Aha, Socket 462. The Semprons he used are K7 based.
Geoffrey D. Jacobs
Go to the Chinese Restaurant,
Order the Special
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