Author: Dann Corbit
Date: 21:56:03 09/26/00
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On September 26, 2000 at 13:51:17, Larry Griffiths wrote: >I was looking at these URL's. > >http://members.tripod.com/~RyanMack/computer.htm > >http://members.tripod.com/~RyanMack/hypertech.htm > >Does this look promising for bitboards? A quote: "The first release of the Hyperbola Project is slated for late 2000 or early 2001. Early estimates predict that the program will run 20-25 times as fast as Crafty. Without any special enhancements (except a basic hash table, move ordering, and alpha-beta searching) it is estimated that the program will analyze nearly 3 million NPS (Nodes Per Second) on a 266 MHz processor. Current versions of Crafty analyze about 125,000 positions per second on the same hardware. On the latest Xeon-III 733 MHz processors, it is possible that the NPS rate might exceed 10,000,000 at times." Sounds more like the "Hyperbole" project to me. But the proof of the pudding is in the eating. I'll just have to wait and see. 733MHz/10,000,000 NPS = 73 cycles per node, including all program overhead. I know I would be impressed if that could be achieved. The 125K NPS should be close... Here's what I get at 300 MHz with version 17.11: EPD Kit revision date: 1996.04.21 found computer opening book file [e:/crafty/release/bookc.bin]. hash table memory = 24M bytes. pawn hash table memory = 4M bytes. EGTB cache memory = 2M bytes. draw score set to 0.00 pawns. choose from book moves randomly (using weights.) choose from 5 best moves. book learning enabled result learning enabled position learning enabled threshold set to 9 pawns. 4 piece tablebase files found 1302kb of RAM used for TB indices and decompression tables Crafty v17.11 White(1): bench Running benchmark. . . ...... Total nodes: 52426399 Raw nodes per second: 171328 Total elapsed time: 306 SMP time-to-ply measurement: 2.091503 White(1): Of course, massive hash won't help. That makes NPS go down. I would be curious to see more details about how this is to be worked out.
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