Author: Vasik Rajlich
Date: 01:36:52 03/27/04
Go up one level in this thread
On March 27, 2004 at 04:27:42, Russell Reagan wrote: >On March 27, 2004 at 04:14:02, Vasik Rajlich wrote: > >>Rybka 1.3 >>--- >>Athlon 3400+, 32 bit win XP: 1,201,030 nps >>Athlon 3400+, 64 bit win server '03, 32 bit .exe: 1,201,030 >>Athlon 3400+, 64 bit win server '03, 64 bit .exe (win DDK compiler): 1,506,580 >> >>The speedup is around 20%. >> >>There is a small hopefully-temporory caveat, something is choking the UCI output >>under the 64 bit OS. When Rybka sends all of the UCI "info XXX" commands to the >>GUI, the nps rate drops by about 20%! The above is with all UCI "info XXX" >>commands disabled. >> >>Vas > >Is Rybka bitboard based or array based? > >Also, do you have a comparison with Rybka running on a 32-bit machine? It would >be interesting to know how much of a speedup you get in total when moving from a >32-bit Athlon to the 64-bit Athlon. I have a 2GHz Athlon. If you would like for >me to see how fast it runs, just send me the executable and I will run it. Then >we could compare the 32-bit machine vs. 64-bit machine speedup as well. Rybka is bitboard based, including rotated bitboards. Actually I took the bitscan from a post of yours here some time ago. (I used "Gerd's" algorithm - Eugene's was the fastest, but I was concerned about the cache footprint.) A slightly older (and very slightly slower) version of Rybka gets 797,650 NPS on a pentium 4, 3.06 GHz. The speedup to AMD64 @64 bits is almost 2:1! I don't have exact Athlon XP numbers, but something in the neighborhood of 600 KNPS on 2.2 GHz XP. Ok, I can send you the executable on Monday morning. It would be interesting to get some exact numbers. Vas
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.