Re: hyperthreading on f11 pae kernel?

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On Wed, Sep 02, 2009 at 11:00:14AM -0500, Michael Cronenworth wrote:
> Gianluca Cecchi on 09/02/2009 09:10 AM wrote:
> > I have an old Dell GX260 with one P4 and 1Gb of ram.
> > I installed F11 32 bit and updated it yesterday with latest kernel
> > available.
> > I noticed that kernel installed was the PAE one, as stated inside
> > release notes. Also in other documents I see that only i586 is the other
> > available one kernel.
> >>From /proc/cpuinfo I see that there is the ht flag, but the system gets
> > only one cpu.
> > In bios I see no option for enabling/disabling hyperthreading, so that I
> > suppose it is enabled by default.... but I could be wrong....
> > I have to apply in the mean time a bios update but I would like to ask
> > if using PAE implies no ht and if using i586 I can get ht or not in general.
> 
> 
> PAE does not imply HT is disabled. I have a 3.06ghz P4 and I'm seeing
> two logical processors from /proc/cpuinfo. It seems that your BIOS
> disables it by default. I would get in contact with the motherboard
> manufacturer.

And FWIW, my Ausus 901's Atom processor has working hyperthreading too, it
shows up as two processors (using F11's default PAE kernel).

Fire up "top" and press "1" to show a line for "both" processors.

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