Actually it looks like the newer Xeons (dual and quad cores) don't support HT.
I googled and found this comment: "Hyperthreading is only on the NetBurst based 50xx Xeons - the Core2 based 51xx Xeons do not support hyperthreading" The same is apparently true of the 5300 quad-core Xeon. So much for my hope that the new 3GHz eight-core MacPro would hyperthread to give 16 virtual CPUs :-( Guess we're both sol. -brucem ---- Original message ---- >Date: Wed, 25 Apr 2007 14:15:55 -0400 >From: Paul Lussier <[EMAIL PROTECTED]> >Subject: Re: Pentium 805D has an interesting surprise >To: Greater NH Linux User Group <gnhlug-discuss@mail.gnhlug.org> > ><[EMAIL PROTECTED]> 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 ? > >-- >Seeya, >Paul >_______________________________________________ >gnhlug-discuss mailing list >gnhlug-discuss@mail.gnhlug.org >http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/ _______________________________________________ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/