The 15% edge over Opteron is for running one job, right? When using all 8 cores, that becomes roughly 1/2 or 7.5%. The yakut number is for one job, but there are probably other loads. So it's not clear which number is more relevant. 

--
Charles C. Young
M.S. 43, Stanford Linear Accelerator Center       
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> -----Original Message-----
> From: [log in to unmask] 
> [mailto:[log in to unmask]] On 
> Behalf Of Stephen J. Gowdy
> Sent: Tuesday, August 21, 2007 7:45 AM
> To: atlas-sccs-planning-l
> Subject: Re: eval01 comparison
> 
> Hi All,
>  	Sorry for the extra email... the spreadsheet I attached 
> previously didn't include the yakut04 numbers (forgot to hit 
> "Save" first).
> 
>  							regards,
> 
>  							Stephen.
> 
> On Tue, 21 Aug 2007, Stephen J. Gowdy wrote:
> 
> > Hi All,
> > 	So I've ran 1, 2, 4 and 8 jobs simultaneously on 
> eval01. I also ran 
> > one job on yakut04 to compare CPU speeds (so only look at 
> CPU time for 
> > that, wall time is probably not good to compare in this case). I've 
> > attached the spreadsheet with the numbers if anyone wants 
> to look at them.
> > 	The basic conclusion is that the new Intel CPU's GHz 
> are worth about 
> > 15% more than the Opterons (this is a big change from the 
> P4s, where 
> > IIRC BaBar say a 30% drop). Overall we loose about 5% when running 
> > eight jobs on the same machine, with some coming from less CPU 
> > efficiency and more system time used (some more user time 
> too, particularly in going from 4 to 8 jobs).
> > 	The job run was a simulation job which is the most CPU 
> intensive part 
> > of the ATLAS job suite. (only 3 events which took about 30 minutes).
> >
> > 						regards,
> >
> > 						Stephen.
> >
> > --
> >  /------------------------------------+-------------------------\
> > | Stephen J. Gowdy, SLAC               | CERN     Office: 32-2-A22|
> > | http://www.slac.stanford.edu/~gowdy/ | CH-1211 Geneva 23        |
> > | |  Switzerland              |
> > | EMail: [log in to unmask]       | Tel: +41 22 767 5840     |
> >  \------------------------------------+-------------------------/
> >
> 
> --
>   /------------------------------------+-------------------------\
> |Stephen J. Gowdy, SLAC               | CERN     Office: 32-2-A22|
> |http://www.slac.stanford.edu/~gowdy/ | CH-1211 Geneva 23        |
> |                                     | Switzerland              |
> |EMail: [log in to unmask]       | Tel: +41 22 767 5840     |
>   \------------------------------------+-------------------------/
>