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SubjectRe: Kernel reports 4 CPUS instead of 2...
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.


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