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Hi All, So I updated the spreadsheet with numbers for boer0001 (2.6GHz 4-core AMD Opteron). I also attached a PDF version. The Opteron doesn't show nearly as large degradation from multiple jobs. For a single job it's GHz are worth less the same 15% roughly as yakut was, but when you get a fully loaded machine the difference isn't quite as much. So I think when calculating the CPU/$$ the GHz for the Intel should get a boost of around 10% over the AMD for the current generation of chips when thinking about ATLAS jobs. We can talk about this in the meeting later. 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 | \------------------------------------+-------------------------/