Author: Brian Richardson
Date: 19:22:06 09/05/02
Go up one level in this thread
On September 05, 2002 at 18:51:39, Eugene Nalimov wrote: >Dual Itanium (not Itanium2, as I suspect I am under NDA): 1.95 > >Thanks, >Eugene > >On September 04, 2002 at 21:19:05, Robert Hyatt wrote: > >>If anyone has the time, and a dual-cpu machine, would you run the following >>position to depth 13 using first one cpu, then restarting, and running it again >>with two processors? Everything else at default values. >> >>2r2rk1/1bqnbpp1/1p1ppn1p/pP6/N1P1P3/P2B1N1P/1B2QPP1/R2R2K1 b - - 0 1 >> >>That is kopec position 22, one of my favorites. I am only interested in >>two numbers, the raw NPS for 1 cpu, and the raw NPS for two cpus. I don't care >>about the times or anything, just the NPS... >> >>Please include your cpu/speed/vendor/etc... >> >>Vincent thinks that the 2-cpu test will slow way down in terms of NPS. I >>can't reproduce it on my machines here. Eugene can't reproduce it on Intel >>boxes, but the two AMD machines he has tried produce 1.4X the nps using two >>that it produces using 1, while my machines produce about 1.9X the nps... >> >>Thanks... Dual AMD 1900+ One CPU: time=44.75 cpu=99% mat=0 n=38168304 fh=92% nps=852k Two CPUs (after restarting): time=27.69 cpu=397% mat=0 n=38355692 fh=92% nps=1385k info: Crafty version 18.15 hash table memory = 3M bytes. pawn hash table memory = 768K bytes. EGTB cache memory = 1M bytes. Interestingly, with more typical hash settings, one CPU improves a lot, but two CPUs do not, and nps about the same. hash table memory = 384M bytes. pawn hash table memory = 24M bytes: One CPU: time=36.63 cpu=99% mat=0 n=30002420 fh=93% nps=819k Two CPUs: time=24.92 cpu=405% mat=0 n=32725283 fh=93% nps=1313k
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