[Condor-users] Benchmark and MIPS value

[Wolf-Dieter Klotz <klotz@xxxxxxx>]

Hi,
We are running 50 hosts of type: HP Proliant DL145G3 with 2 dual-core 
AMD Opteron processors @ 2218.2 GHz. We see surprisingly low
MIPS values reported by Condor. Values that can not be correct. We use 
MIPS as a rank criterion. As a result most of our batch jobs are sent
to older, less per formant machines. We think that this is related to 
the fact that these computers work with cpu frequencies which are 
dynamic, i.e. the hardware reduces the cpu frequency when the machine is 
not loaded to save power and it speeds up when the machine gets loaded. 
Condor's benchmark is run only when a machine is idling and it finds too 
low MIPS values!!! Is our suspicion correct? Did anyone see a similar 
behavior? Is it possible to get better benchmark results (avoiding this 
effect)?
Cheers....
WDK

--
Dr.W-D.Klotz - Europ. Synch. Rad. Facility (ESRF)
BP 220, 38043 Grenoble, CEDEX 9, France
work  : +33(0)4.76.88.29.21, fax: ...24.27
mobile: +33(0)6.87.38.59.27
mail  : klotz@xxxxxxx or wdklotz@xxxxxxxxx