[gmx-users] Barcelona vs Xeon

Carsten Kutzner ckutzne at gwdg.de
Wed Nov 28 09:55:05 CET 2007

Hi Martin,

we have carried out benchmarks on a Barcelona 2.0 GHz versus a 2.3 GHz
Clovertown. Here are numbers for an 80000 atom system with PME
electrostatics and Gromacs 3.3.1.

On the Barcelona we get a performance of 0.38, 0.71, 1.27 and 2.40
ns/day for 1, 2, 4, and 8 CPUs, respectively. On the Clovertown we get
0.52, 0.97, 1.75, and 2.74 ns/day. So indeed the scaling on the AMDs is
much better on 8 CPUs (80% compared to 66%), but the absolute
performance is better on the Intels.

For a 2.0 GHz Clovertown the absolute performance on 8 CPUs is probably
nearly the same as on a Barcelona, but the single-CPU performance will
still be better on the Clovertown. One has to keep in mind, however,
that this is just a single benchmark and other MD systems might show a
different scaling behaviour.


Martin Höfling wrote:
> Hi all,
> Barcelona 1.9GHz vs Xeon 2.0GHz
> has anyone here benchmarked these two available 8-core solutions? Speed/core 
> wins probably the intel side but what about scaling on 8 cores? Has the 
> NUMA/Hypertransport architecture an advantage here?
> In price, they are very similar. Xeon is of course available with higher 
> frequencies but also increases in cost/cpu very fast.
> Best
> 	Martin
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Dr. Carsten Kutzner
Max Planck Institute for Biophysical Chemistry
Theoretical and Computational Biophysics Department
Am Fassberg 11
37077 Goettingen, Germany
Tel. +49-551-2012313, Fax: +49-551-2012302

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