Author: J. Wesley Cleveland
Date: 16:44:19 02/04/04
Go up one level in this thread
On February 04, 2004 at 18:11:59, Andrew Dados wrote: >On February 04, 2004 at 18:00:18, Slater Wold wrote: > >>On February 04, 2004 at 17:46:28, Andrew Dados wrote: >> >>>On February 04, 2004 at 17:34:33, C McClain Morris, Jr. wrote: >>> >>>>How did you go about determining hash table size for Crafty on that hardware in >>>>the tournament? Is there a formula you use for determing hash table size for >>>>various time controls? And, by the way, congratulations. >>> >>>Hash table formula is simple: As big as you can without OS paging. Has nothing >>>to do with time controls of the game. Where did that urban legen start? >>> >>>-Andrew- >> >>Perhaps for tournament length games. Not so for blitz. >> >>Imagine using 4GB of RAM, in a 1/0 game. > >Whats wrong with that? Imagine you'll have 3000 Ghz processor one day and 10ns >memory latency... > >I understand there is some practical, minimal HT size beyond which more HT >brings no appearent effect and it depends on nps and game time control. However >one can't go wrong with my formula (see above). >-Andrew- Larger hash is slower. You get less chance that the entry is in cache, and more ATB misses.
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