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Subject: Re: shredder bench program is a horrible tool for measuring speed!!

Author: Ingo Bauer

Date: 11:45:07 02/08/05

Go up one level in this thread


On February 08, 2005 at 14:39:25, Robert Hyatt wrote:

>On February 08, 2005 at 11:27:12, Helmut Conrady wrote:
>
>>On February 08, 2005 at 11:17:33, joseph soney wrote:
>>
>>>Dual 250 opterons 2 threads=2.52
>>>1 thread=2.52
>>>its the same speed for 1 or 2 threads in deep shredder 9????
>>
>>Yes, because it´s a tool only for ONE CPU. One should know that, before he
>>writes "horrible" in the main line ...
>>
>>Helmut
>
>Makes little sense to me.  Why would a multi-threading program only use one CPU
>for a benchmark, but use two to actually play?  Crafty will do this either way.
>mt=0 or 1, and you run the bench command using one CPU, mt=2 and you run it with
>2, etc...

Because it is the GUI that is doing the test, not the engine. The feature is
undocumented for exactly that reason and because the test is highly doubtfull. I
made the mistake to publish it again (It was allready known, but I brought it
back to memory of some people)

Bye Ingo



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