RE: AMBER: Any experience on Dell two quad core system?

From: Andreas Svrcek-Seiler <>
Date: Mon, 13 Aug 2007 17:12:15 +0200 (CEST)

Hi all,
I've just gotten my hands on 2 dual quad core machine with 2.33GHz Xeons.
With NAB and openmp-parallelization, I get a nearly 8-fold speed increase
for implicit solvent (GB) runs and the big example (~18000 atoms)I just
For the "cox2" benchmark (100 timesteps, cut=18, rgbmax=17) I get
1 CPU 742s
2 CPU 375s
4 CPU 190s
8 CPU 97s

So despite the architecture's weaknesses, 8 cores are about 7.6 times
faster that one core. A quick test with two independent jobs on four cores
each also showed that they don't seem to interfere with each other.

...just 2 cents more


            ( O O )
               o Wolfgang Andreas Svrcek-Seiler
               o (godzilla)
       .oooO Tel.:01-4277-52733
       ( ) Oooo.
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Received on Wed Aug 15 2007 - 06:07:27 PDT
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