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On Tue, 21 Aug 2007, Young, Charles C. wrote: > 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. Well, the yakut was busy I used so you can't compare the Wall Time. The 15% edge I expected to be reduced by the 5% loss, so down to 10%. I should try a multicore Opteron and repeat multiple jobs there. Can I have one of the new-ish machines to do that? > -- > Charles C. Young > M.S. 43, Stanford Linear Accelerator Center > P.O. Box 20450 > Stanford, CA 94309 > [log in to unmask] > voice (650) 926 2669 > fax (650) 926 2923 > CERN GSM +41 76 487 2069 > >> -----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 | >> \------------------------------------+-------------------------/ >> > -- /------------------------------------+-------------------------\ |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 | \------------------------------------+-------------------------/