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Subject: Re: hash-size for CM6000

Author: Bertil Eklund

Date: 12:36:42 06/17/99

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On June 17, 1999 at 05:42:04, John R. Menke, Sr. wrote:

>Folks--Bertil is correct! CM6000 comes with the default setting of TTABLE=20 in
>cm.ini which is 1MB hash. Set TTABLE=21 for 2MB hash. Set TTABLE=22 for 4MB
>hash. Set TTABLE=23 for 8MB hash. Set TTABLE=24 for 16MB hash. You could also
>try setting TTABLE=25 for 32MB hash if you have 64MB RAM or more. Or at the
>other end of the spectrum if you have very little RAM, TTABLE=19 would give
>0.5MB hash, etc. I have done some tests with my old slowpoke i486 66MHz with
>32MB RAM, and for me 8MB hash seems about right. Rough rule of thumb: Use about
>1/4th of your RAM for hash.  It is also a function of your time setting. There
>is a slight improvement if you can use a bigger hash table with long time
>controls.  But there's really not much difference, maybe at most a 10%-20%
>improvement in speed of calculation! The value of hash tables seems overblown,
>certainly for CM6000. For best results, buy the fastest processor you can
>afford...  JRM

Hallo!

We use 16mb hash for our testing. Mr de Koning told us that 16mb is "more then
enough". This for P200MMX and 2h/40 moves. Note that if you use to big hahtables
it makes the program slower. For Junior5 I use 102,4mb on AMD450 K6-2. I first
tried with 114mb but it seemed to be slightly to much.

Regards Bertil SSDF



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