Author: Ian Osgood
Date: 15:22:28 06/10/01
Go up one level in this thread
On June 10, 2001 at 16:37:21, Gordon Rattray wrote: >On June 10, 2001 at 02:32:25, Ian Osgood wrote: > >>Good question. I haven't used much other than the default 3M size, except to >>test the hash option code. I know that Christopher Theron believes that 48K >>tables are big enough for Tiger on the palm (about 500 nps). PocketCrafty >>obtains about 5000 nps on an iPAQ, so maybe around 480K is more reasonable. >> >>This would be an area you could test and report on if you like! >> >>Ian > > >Ok, I've now performed some testing as follows. Due to limited time I've only >tested against one position: > >[D] 1r2kb1r/1p1R1ppp/4p3/q2pP1B1/p2Q4/P2B4/1P3PPP/2R3K1 w - - > >Test setup: >Compaq Iqaq, 64Mb >PocketCrafty v1.0 using Crafty 18.6 >Analysed position for 10 minutes at each setting. > >Results (times are mins:secs): > >Hash table size / Time to find Rxd7 / Time to display depth "9 ->" / Nodes per >second > >48k 1:35 9:18 6562 >96k 1:48 8:53 6580 >192k 1:48 7:43 6761 >384k 1:29 7:31 6634 >768k 1:23 6:56 6753 >1536k 1:20 6:49 6801 >3072k 1:22 6:37 6800 >6144k 1:21 6:34 6827 >12888k 1:21 6:20 6756 > >It is not possible to configure PocketCrafty to use anything above 12888k. > >So, for longer time controls there is a definite benefit, but such time controls >probably won't get used much on a PDA. > >Gordon Great data! From this, I would say that 768K seems to be a better default setting, as the returns diminish greatly after that. I agree that most users will probably use it at no more than ten seconds per move. If you have time, testing an endgame problem would also be useful, since that is where transposition tables really shine. Another variable to test would be the pawn hash table (set by "hashp <size>" in the Advanced dialog). I imagine the 500K default size is also too large. Thanks, Gordon! Ian
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.