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Subject: Re: Odd hyperthreading behavior

Author: Jeremiah Penery

Date: 18:57:51 10/05/03

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On October 05, 2003 at 16:43:21, Eugene Nalimov wrote:

>On October 05, 2003 at 15:41:33, Jeremiah Penery wrote:
>
>>On October 05, 2003 at 13:46:51, Vincent Diepeveen wrote:
>>
>>>There are windows functions to attach a certain process to a certain cpu.
>>
>>Yes, I know, it's very easy for a single-threaded process.
>>
>>>Really nothing new. Was there in NT already years ago.
>>
>>Can you set a process to have affinity for multiple CPUs?
>
>http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/setthreadaffinitymask.asp

Ok, so it has to be hardcoded in.  A little bit of annoyance, but not a big
deal.  So why doesn't anyone ever do it?  That is, all test results I've ever
seen for Hyperthreading that have detailed processor usage reports, for any
program (chess or not), have not used this ability.



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