Author: Robert Hyatt
Date: 15:26:38 05/01/04
Go up one level in this thread
On May 01, 2004 at 18:20:09, Vincent Diepeveen wrote: >On May 01, 2004 at 18:10:32, Robert Hyatt wrote: > >>On May 01, 2004 at 15:18:33, Joachim Rang wrote: >> >>>On May 01, 2004 at 15:06:24, Robert Hyatt wrote: >>> >>>>My results... on a quad 700mhz xeon >>>> >>>>1cpu 289 secs 1.0 speedup 294K nps >>>>2cpu 172 secs 1.7 speedup 571K nps >>>>3cpu 127 secs 2.4 speedup 833K nps >>>>4cpu 100 secs 2.9 speedup 1079K nps >>>> >>>>Unfortunately this machine was running nfs for the entire department so it >>>>wasn't totally idle, but the numbers seem within "reason" of what I would >>>>expect. Note also that I didn't run multiple runs and average the times, so >>>>there could be some random noise in the above as always... >>> >>>still below 3 even for such a SMP-Giant like Crafty. >>>For an 8-way machine what do you expect? >>> >>>regards Joachim >> >> >>My estimate is always speedup = 1 + (CPUS - 1) * .7 as a rough number. Some >>positions go higher, some go lower... >> >>So figure about 6x on 8-way... I have tested that myself. 16 and beyond are >>not so clear yet... > >8 ways are kind of NUMA, so forget it for crafty. So was the 4-way I ran on at the last CCT. forget whatever you want. I'll continue to do just fine on NUMA boxes myself... The 8-way I tested on at AMD was _also_ NUMA as I have reported in the past, not that I'd expect your memory to recall that...
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