 |
 |
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 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 | > \------------------------------------+-------------------------/ >