Author: Russell Reagan
Date: 01:42:10 12/10/03
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On December 10, 2003 at 02:50:45, Tony Werten wrote: >On December 09, 2003 at 10:29:00, Albert Bertilsson wrote: > >>Hi! >> >>I've finally got around verifying perft(10) from the starting position and it >>is: 69352859712417, that is 69*10^12 nodes. >> >>It took 85 hours for my four computers to calculate it. If some people has a >>couple of spare cpu cycles perft(11) would be no mayor problem to calculate. > >That's over 226 Mn/s. Quite high. Wow. It sure is. Even for 4 computers working on it. The fastest public perft calculator that I know of is Movei, which calculates at about 15 Mnps on my Athlon 2400+ (which is faster than any of the hardware mentioned). I have heard that a private version of Yace is faster. Even if Yace is twice as fast, running on four Athlon 2400+'s (which would be faster than the mentioned hardware), we are still only at 120 Mnps. Only two of the computers were running 24/7 too. With a generous estimate of about 7GHz of the total number of cycles executed between all four machines per second (and assuming they were running 24/7), we're looking at about 40 cycles per node. That is a lot of asumptions, and we are still 100 Mnps short. So that's either very impressive, or something is wrong :) >Tony > >> >>Hardware used: >>XP2100+ (256MB hash) >>XP1700+ (128MB hash) (not working on the problem 24/7) >>Celeron 800 (128MB hash) (not contributing very much =)) >>P4 2GHz (256MB hash) (not working on the problem 24/7) >> >>/Regards Albert
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