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From: Samuel Flory <sflory@rackable.com>
To: root@chaos.analogic.com
Cc: Mark Cuss <mcuss@cdlsystems.com>, linux-kernel@vger.kernel.org
Subject: Re: Kernel reports 4 CPUS instead of 2...
Date: Wed, 16 Oct 2002 11:14:05 -0700	[thread overview]
Message-ID: <3DADAC6D.8080407@rackable.com> (raw)
In-Reply-To: Pine.LNX.3.95.1021016135105.150A-100000@chaos.analogic.com

Richard B. Johnson wrote:

>On Wed, 16 Oct 2002, Samuel Flory wrote:
>
>  
>
>>>On Wed, 16 Oct 2002, Mark Cuss wrote:
>>>
>>> 
>>>
>>>
>>>This is the correct behavior. If you don't like this, you can
>>>swap motherboards with me ;) Otherwise, grin and bear it!
>>>
>>> 
>>>
>>>      
>>>
>> 
>>  Wouldn't it be easier just to turn off the hypertreading or jackson 
>>tech option in the bios ;-)
>>
>>    
>>
>
>Why would you ever want to turn it off?  You paid for a CPU with
>two execution units and you want to disable one?  This makes
>no sense unless you are using Windows/2000/Professional, which
>will trash your disks and all their files if you have two
>or more CPUs (true).
>
>  
>

  Actually I can think of 3 obvious reasons:

1)Your app is cache bound, and not cpu bound.
2)Your system tends to only run 1 or 2 non thread activities at a time.
3)You don't trust hyperthreading.



  reply	other threads:[~2002-10-16 18:02 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-10-16 17:24 Kernel reports 4 CPUS instead of 2 Mark Cuss
2002-10-16 17:35 ` Richard B. Johnson
2002-10-16 17:56   ` Samuel Flory
2002-10-16 17:54     ` Richard B. Johnson
2002-10-16 18:14       ` Samuel Flory [this message]
2002-10-16 19:28       ` James Cleverdon
2002-10-16 19:44         ` Mark Cuss
2002-10-16 20:10           ` Richard B. Johnson
2002-10-16 20:47           ` Samuel Flory
2002-10-16 21:44             ` Mark Mielke
2002-10-16 22:14               ` Samuel Flory
2002-10-16 22:21             ` Mark Cuss
2002-10-16 18:37     ` Mark Cuss
2002-10-16 23:21   ` Bryan Whitehead
2002-10-17  0:34     ` Mark Chernault
2002-10-17 12:56     ` Richard B. Johnson
2002-10-17 14:19       ` Dave Jones
2002-10-17 17:15       ` Bryan B Whitehead
2002-10-16 17:37 ` Joel Jaeggli
2002-10-16 17:48   ` Mark Cuss
2002-10-16 17:44 ` FD Cami
  -- strict thread matches above, loose matches on Subject: below --
2002-10-16 18:08 Nakajima, Jun
2002-10-17  1:02 Matt_Domsch

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