[Beowulf] Strange Opteron 2350 performance: Gaussian-03

Bernd Schubert bernd-schubert at gmx.de
Sat Jun 28 10:04:50 PDT 2008


On Saturday 28 June 2008, Li, Bo wrote:
> Hello,
> Sorry, I don't have the same applications as you.
> Did you compile them with gcc? If gcc, then -o3 can do some optimization.
> -march=k8 is enough I think.

As Mikhail wrote in his first mail, he uses binaries from Gaussian Inc. Can 
gfortran in the mean time compile gaussian? Even if it can, it might be a 
problem for publications, since the only officially supported compiler is 
pgf77.
Mikhail, do you have the source at all? Due to the different cache model of 
the barcelona a recompilation might really help.

> And you make sure the CPU running at the default frequency. Sometime

Yeah, can you check the scaling governor isn't set to ondemand or 
conservative?


Cheers,
Bernd



More information about the Beowulf mailing list