Pentium 805D has an interesting surprise

[mike ledoux]

On Wed, Apr 25, 2007 at 02:15:55PM -0400, Paul Lussier wrote:
> <bmcculley at rcn.com> writes:
> 
> > There are also a few dual cores with hyperthreading, Xeon was one
> > product line I noticed had such models.
> 
> Yeah, I just checked one of our new machines which is a dual
> dual-core.  It reports 4 "GenuineIntel" CPUs in /proc/cpuinfo, all of
> which have the 'ht' flag set. 
> 
> So, in theory, if I were to enable HT in my kernel, I might well see 8 CPUs ?

Unless the 'ht' flag is set on dual-core CPUs that don't actually
support it, yes. /proc/cpuinfo on the system I'm working on now (two
3.0GHz Xeon dual-core hyperthreading CPUs) reports 8 CPUs.

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