Pentium 805D has an interesting surprise

[Thomas Charron]

On 4/25/07, Bob King <bob.king.1138 at gmail.com> wrote:
> On 4/25/07, Bill McGonigle <bill at bfccomputing.com> wrote:
> > Right, 'ht' just reports whether the CPU knows it has hyperthreading
> > or knows it doesn't have hyperthreading.  This tripped me up for a
> > good hour once!
> > I have a 2.5GHz P4 here without hyperthreading, but it knows that it
> > doesn't:
> >    $cat /proc/cpuinfo
> >    flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge
> > mca cmov pat
> >    pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe up cid xtpr
>  That seems a bit odd.So you are saying the flag indicates only that it
> understands that flag, rather than has that capability? Wouldn't it be more
> useful to show what capabilities it HAS rather than those it knows about?

  The flag itself means you can ask the question.  :-)

  Look for siblings : 2 in the cpuinfo.  If it has the HT flag, but
siblings is 1, it answers the question.

  Think of it as a matrix question.  'Just remember, there is no
spoon, err, HT.'

-- 
-- Thomas