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SubjectRe: Programtically tell diff between HT and real
So, if I understand correctly, there is no way to know
definitively if a cpu is HT or not?

Thanks!
Phy

--- David van Hoose <david.vanhoose@comcast.net>
wrote:
>
>
> Robert Love wrote:
> > On Wed, 2004-06-16 at 13:56 -0400, Robert Love
> wrote:
> >
> >
> >>Yah. Look at /proc/cpuinfo.
> >>
> >>Virtual processors have different 'processor'
> values but the same
> >>'physical id', while physical processors obviously
> have different values
> >>for both.
> >
> >
> > Oh, and if you just want to see if a processor
> supports HT - the 'ht'
> > flag is set in 'flags' in /proc/cpuinfo.
>
> Not always true. I have a non-HT Pentium4, but I
> still have ht in my
> flags. The same goes for a couple of dual Xeon's I
> work on at school.
> Aparently Intel disabled the HT on a lot of Pentium
> 4 and Xeon chips,
> but left the HT flag behind. My system even has the
> additional IO-APICs
> too. Hence why everytime I boot a UP kernel, I get
> an 'unexpected
> IO-APIC' message.
>
> Cheers,
> David
>

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