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Subject: Re: Max CacheSize on nalimov tables in Shredder

Author: Vincent Diepeveen

Date: 13:59:30 04/30/04

Go up one level in this thread


On April 30, 2004 at 15:52:14, Ingo Bauer wrote:

>On April 30, 2004 at 14:42:29, Vincent Diepeveen wrote:
>
>>On April 30, 2004 at 13:44:17, Ingo Bauer wrote:
>>
>>>On April 30, 2004 at 13:36:44, Ingo Bauer wrote:
>>>
>>>>On April 30, 2004 at 09:53:01, Karl-Johan Olsen wrote:
>>>>
>>>>>btw. it's in the classical interface...
>>>>
>>>>Hi
>>>>
>>>>I never checked this and can't at the moment (will later) but it is completly
>>>>useless. 64 is more than enough, let the OS do the caching job!
>>>>
>>>>Bye
>>>>Ingo
>>>
>>>OK, I could not wait:
>>>
>>>CPU0: AuthenticAMD x86 Family 6 Model 10 Stepping 0 2505 MHz
>>>GUI: Tablebases with 5 pieces found! [Cache: 999 MB + internal 13.67 MB]
>>>Engine: Shredder 8 (64 MB)
>>>by Stefan Meyer-Kahlen
>>>  4/04	 0:00 	  +M11	1.Ne6 Rg6 (95) 5
>>>best move: Nc7-e6 time: 0:00.016 min  n/s: 7.687  CPU 93.7%   n/s(1CPU): 8.203
>>>nodes: 123 TB: 174
>>>
>>>There seems to be a limitation of 999 MB for the TBs Cache, and the 5 Pcs at
>>>least are working fine. But again 999 is completly useless! The OS is doing the
>>>caching job allready. Use a bit more for Engine-Hash and let 100-200 MB Memory
>>>free for the OS. Done!
>>>
>>>Ingo
>>>
>>>Ingo
>>
>>The OS might cache it Ingo, but won't decompress it for you which also takes
>>quite some time. A bigger EGTB cache works better than letting the OS find the
>>golden coins.
>
>Hi Vincent
>
>Sure you are right, but do I need 256 MB for deccompressing? As far as I
>understood it there are two point:
>1. There is only that part decompressed that is needed.

Well in fact it depends upon how the chessprogram is built. If the programmer
accesses egtb's a lot it might be helpful, otherwise like 32 MB will do.

Under 32MB is real poor.

>2. More hash is more usefull during the game than large Cache at the end.
>
>But Ok: Worth a discussion! :-)
>
>Ingo



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