[gmx-users] Benchmark performance question...

[Stéphane Teletchéa]

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 ?

Stéphane

System :
Pentium IV 2*2.6 Ghz SMP
1GB of memory
Gromacs 3.3 compiled with single/double precision with/without MPI 
(mpich 1.2.5.2-5mdk)
MandakeLinux LE2005, gcc 3.4.3-7mdk, kernel 2.6.11-6mdksmp

-- 
Stéphane Téletchéa, PhD.                  http://www.steletch.org
Unité Mathématique Informatique et Génome http://migale.jouy.inra.fr/mig
INRA, Domaine de Vilvert                  Tél : (33) 134 652 121 / 3086
78352 Jouy-en-Josas cedex, France         Fax : (33) 134 652 901