Author: Djordje Vidanovic
Date: 07:31:00 05/02/04
Go up one level in this thread
On May 02, 2004 at 00:04:49, Robert Hyatt wrote: >On May 01, 2004 at 22:36:35, Eugene Nalimov wrote: > >>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. >> >>As well as 32-way Itanium on which I tested Crafty some time ago... >> >>Thanks, >>Eugene > > >You should realize that our pitiful knowledge pales in the presence of the >world's foremost authority on everything. I really don't see why anyone would >enter a tournament where his program plays since they have no chance against >his. > >Wait. Has he ever won one for real? > >Wait again. Seems that ICC is broken in that it shows that crafty vs diep has >looked like this (from crafty's perspective): 468 wins. 156 losses. 166 >draws. So maybe there _is_ hope for the rest of us??? > >I've never seen anyone that knows so much about everybody _else's_ programs. Or >at least that _thinks_ he knows so much about everybody else's programs... > >Fortunately the reality of actually playing in events catches up with the >fantasy-land claims and pronouncements... I guess it's normal for duals to have somewhat bigger speedup? I think that I am getting about 1.8 speedup here on my dual Xeon (HT). Djordje
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