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Subject: Re: NPS for Palm and Pocket PC's

Author: Chris Carson

Date: 04:28:03 03/17/03

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On March 16, 2003 at 21:49:01, Christophe Theron wrote:

>On March 16, 2003 at 19:53:10, Jason Waugh wrote:
>
>>I'll contribute what I can, for what it's worth:
>>
>>Using the test position posted....
>>
>>Chess Tiger 15 (Palm Tungsten T, 1.5MB HT) - 390 NPS
>>Chess Tiger 15 (Pentium II 400MHz w/Win2K, 384MB RAM, 96MB HT} - 82,000 NPS
>>
>>
>>On the Tungsten T, CT15 runs under PACE and runs at the same speed as it does on
>>a 33MHz palm device.  This isn't just "the word on the street" - I can vouch for
>>this, as TigerMark (CT's built in benchmark) displayed the same score on my m505
>>as it does on my Tungsten.  I cannot test overclocking since I no longer have my
>>m505.  When we can see how well it runs with some ARM code depends on
>>Christophe.  ;)
>>
>>Since similar engines are not available for Pocket PC and Palm, then the
>>comparison can't exactly be scientific - but if it helps, I tested that position
>>on my PC with Ruffian (96MB HT) and achieved 185,500 NPS
>>
>>(hmmn, interestingly enough, despite the fact that Ruffian was more than "twice
>>as fast" - CT15 was well into 14 ply depth before the minute was up, Ruffian
>>only in the middle of 12.  Mind you, that doesn't necessarily mean anything
>>either.)
>>
>>
>>Jason.
>
>
>
>A small advice for the sake of reliability:
>
>The NPS in Chess Tiger is influenced by the amount of hash tables. I think any
>other engine out there is similarly influenced. The more hash table, the slower
>NPS you get.
>
>So you should test CT15 on Palm and on PC with the same hash table size (for
>example 6Mb because it is reasonably possible to get this on the Tungsten-T).
>
>
>
>    Christophe

Thanks Christophe, good advice and keep up the great work on CT.



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