Re: [Condor-users] Intel Core i7 processors?

[Chris Freemesser <chris@xxxxxxxxxxxxxxxxx>]

On 4/13/10 3:59 PM, Erik Paulson wrote:
> Is your benchmark:
>
> A) The same program as your Condor job
> B) Operating on the realistic data, ideally actual data?
>
> There should be virtually no difference between running a program
> through Condor on a machine and logging into that machine and running
> it by hand. Anything other than that may or may not be a useful
> predictor of performance.

I initially benchmarked the two machines using GeekBench.  The old 
Opteron-based machine scored 3323, the new i7 machine scored 7971.

After I put the new node into service, I had one of my users submit four 
identical jobs...two to the new node, two to an old node.  The i7-based machine 
finished in ~100 hours, the Opteron-based machine finished in ~120 hours.  This 
is obviously not the result I was expecting.

The Core i7 processor has a number of new technologies in it, and my initial 
thought was that one of these technologies may be causing problems.  That's why 
I asked if anybody else is using i7's, just to see if others are getting 
similar results.

Chris

_____________________________________________
Chris Freemesser, University of Rochester
Department of Brain & Cognitive Sciences /
Center for Visual Science
Meliora Hall, Room 244
E-Mail: chris@xxxxxxxxxxxxxxxxx
Phone:  (585)275-0786
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