Re: P4 HT doesn't work
I asked a question like this a while ago, and was told that this flag does
mean that the chip has functioning HT, what it means is that the means
by which you can ask the question as to whether it has HT exists. You
will then get the answer no. Quite why they bother I do not know, but
I am told this is the way it works.
David
On Wednesday 19 October 2005 05:53, Erich Steiger wrote:
> joe, you are right! i was looking to the CPU flags and saw the HT flag, so
> i thought this CPU should support that, my mistake. installing debian on
> another system with a "real" HT CPU was successful.
>
> eric
>
> On Tuesday 18 October 2005 21:40, Joseph H. Fry wrote:
> > On Mon, 2005-10-17 at 22:42 +0200, Debian wrote:
> > > I have a P4 1.6 GHz with HT. It is enabled in the Bios and i'm using
> >
> > the
> >
> > > linux-image-2.6.12-SMP kernel. wheter x86info not /proc/cpuinfo are
> > > knowing something about 2 virtual CPU's.
> > > What is going wrong?
> >
> > Correct me if I'm wrong, but didn't hyperthreading start at 2.8GHz?
> > Hell I even have a 2.8 that doesn't have HT... the flag is there in
> > cpuinfo, but no second cpu.
> >
> > I'm betting that's your problem, you believe it when cpuinfo says you
> > have HT... I don't think you actually do though. Do a google search for
> > "proc/cpuinfo ht flag" and you will find that most (all?) p4's have the
> > flag set, but not all support HT.
> >
> > Joe
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