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Subject: Re: question about using computer with 2 processors

Author: Jorge Pichard

Date: 06:17:45 06/02/04

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On June 02, 2004 at 09:13:03, Uri Blass wrote:

>On June 02, 2004 at 09:00:53, Ricardo Gibert wrote:
>
>>On June 02, 2004 at 08:40:55, Uri Blass wrote:
>>
>>>I plan to buy a cheap computer with 2 processors dual PIII1000 Mhz for testing.
>>>I will probably also buy more expensive computer for WCCC with one processor
>>>when I may use the cheap computer for testing with ponder on.
>>>
>>>
>>>I still did not buy it and before buying it I have a question.
>>>
>>>The question is if I can tell the program which processor to use or tell the
>>>program to choose automatically one of them when I have no control about it.
>>>
>>>Another question is if I can be sure that the processors are of equal speed(if
>>>they are not of equal speed then the question which processor the program is
>>>using may be important.
>>>
>>>Can I be sure that one 1 Ghz is not 1.01ghz when the second 1ghz is 0.99 ghz?
>>>
>>>Uri
>>
>>This would make make one processor a little over 1.02 times faster for a less 3
>>elo advantage if it assumed that each doubling of speed is worth 100 elo. To
>>resolve such a difference in your testing would require an obscene number of
>>games. In other words, it's not relevant.
>
>I agree that it is not a big difference but if there is a simple way to avoid
>noise it is better to do it and I prefer to be able to control the processor
>that the program is using so I do not care about difference in speed when I
>always use processor A for movei and processor B for the opponents.
>
>Uri

Since the difference in speed if there happens to be a significant difference is
so minimal, simply switch from processor A for Movei to processor B to the
Opponent and vise versa after half way of your testing.

Jorge



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