[Beowulf] Strange Opteron 2350 performance: Gaussian-03

Bernd Schubert bernd-schubert at gmx.de
Sat Jun 28 13:04:50 EDT 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 
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 

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