[gmx-users] Benchmark performance question...
David van der Spoel
spoel at xray.bmc.uu.se
Thu Dec 8 13:17:55 CET 2005
Stéphane Teletchéa wrote:
> Since my mail did not get much answer, i presume it was not clear enough...
> I'm benchmarking my system and i had these results (for villin as in
> gmxbench-3.0.tar.gz) :
> NbCPU Time (real) Perf (ns/day)
> single precision : 1 109.00 8.463
> single precision : 2 102.00 8.471
> double precision : 1 150.00 5.915
> double precision : 2 166.00 5.205
> Is it possible to have only a small increase (single precision) on 1 vs
> 2 processors (single precision) or do i need to multiply by nb of
> processors (two) the reported performance for 2-cpus ?
> Is there a file where this total performance is stored ?
It looks like you didn't run in parallel at all...
Is this a dual Xeon machine? Hyperthreading (on a P4) will make it slower.
> System :
> Pentium IV 2*2.6 Ghz SMP
> 1GB of memory
> Gromacs 3.3 compiled with single/double precision with/without MPI
> (mpich 22.214.171.124-5mdk)
> MandakeLinux LE2005, gcc 3.4.3-7mdk, kernel 2.6.11-6mdksmp
David van der Spoel, PhD, Assoc. Prof., Molecular Biophysics group,
Dept. of Cell and Molecular Biology, Uppsala University.
Husargatan 3, Box 596, 75124 Uppsala, Sweden
phone: 46 18 471 4205 fax: 46 18 511 755
spoel at xray.bmc.uu.se spoel at gromacs.org http://xray.bmc.uu.se/~spoel
More information about the gromacs.org_gmx-users