Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Shredder 9 performance - advice please !

Author: Chuck

Date: 05:29:09 08/27/05

Go up one level in this thread


On August 25, 2005 at 07:24:46, Gian-Carlo Pascutto wrote:

>On August 25, 2005 at 07:22:51, Chuck wrote:
>
>>On August 25, 2005 at 07:09:29, Günther Simon wrote:
>>
>>>On August 25, 2005 at 06:37:21, Mark Mason wrote:
>>>
>>>>Gian-Carlo,
>>>>
>>>>Thanks for your comments. 2 kinds of results:
>>>>
>>>>a) It is quite often coming out of the opening already down on score, and then
>>>>seems to struggle to catch up. I'm using the standard Shredder.ctg that came
>>>>with the software. Are there improvememnts to this opening book that I could try
>>>>?
>>>>
>>>>b) fairly even until late middle game/start of end game, but then seems to go
>>>>downhill as time stats runninjg out.  I have 4 man Nalimovs loaded, and am going
>>>>through loading 5 man tables, but only have a few on at the moment. Maybe this
>>>>is making a difference ?
>>>>
>>>>Any thought about changing default engine parameters ?
>>>>
>>>>Thanks,
>>>>
>>>>Mark
>>>
>>>Post one or 2 games including depth/eval/time which show what you mean
>>>and we will know a bit more.
>>>(your hash setting is no prob and Shredder is much slower in nps than Fruit,
>>>not sure though, if the relation is really ~3:1 normally)
>>>
>>>Guenther
>>
>>
>>I have noticed when playing Shredder 9 UCI in the chessbase GUI that in engine
>>matches Shredder 9 will often take 15-50 seconds or so before it starts
>>thinking. I say this because that's when the first line of analysis displays and
>>it is at a low (starting) depth. This pause is also the reason for the low nps
>>display, after the 1st 30 seconds, 0 nodes have been evaluated. On my 2000 (2.4)
>>GHz Athlon, Shredder 9 UCI gets generally about 320-360 Knps. I haven't tried to
>>solve this problem, but I did not it's impossible to play game in 1' or even 5'
>>with this kind of lag. :0
>
>Sounds like too large hashtables that are being swapped to disk.
>
>--
>GCP


Yes, after posting my last I did look into it and that may be the case. It seems
that even if you specify only 8 MB hash tables for Shredder 9, it still eats up
about 100 MB when it loads (being the UCI version and not the native CB
version). Having a few other apps open was probably pushing the machine above
its 512 MB of physical memory.
Chuck



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.