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Subject: Re: Question about hash-tb size for Gambit

Author: Robert Raese

Date: 21:18:14 04/26/01

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On April 26, 2001 at 23:52:17, Thomas Scherk wrote:

>>On this computer I would recommend 192Mb hash tables and 32Mb TB cache.
>>
>>But please make sure that this setting does not slow the program down
>>dramatically. It depends on your system, so please try with for example one
>>middlegame position and one deep endgame position.
>>
>>Try with 64Mb HT and 192Mb HT. Set up the program to reach a fixed depth on your
>>middlegame position. If the NPS is almost the same with 64Mb and 192Mb, then
>>it's OK to use 192Mb HT.
>>
>>Then set the HT to 192Mb (if it is OK), then load the endgame position. Same
>>experiment at fixed depth, but this time with 1Mb TB cache and 32Mb TB cache.
>>
>>But that's a very classical way to test these things, I'm sure you are used to
>>this procedure already.
>>
>>
>>
>>    Christophe
>
>Dear Christophe,
>
>I think Bertil tells us, that the Computer has 256 MB. Depending on the OS, he
>is using, and depending on the loading of some drivers, maybe Ethernet, Sound,
>VGA with high resolution and 32 Bits depth Colour, there will be only about 180
>MB left from these 256 MB.
>
>You write "...same with 64 MB and 192 MB...". Is this right? I was told by
>ChessBase that you can use any amount of hashtables but it must be an amount
>computed with the formula 3*2^n MB. Is this right?

thomas... i'm not very mathematical...  what is "^n"?



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