Messages in this thread | | | Date | Thu, 22 Aug 2002 10:05:24 +0200 (CEST) | From | venom@sns ... | Subject | Re: Hyperthreading |
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On Wed, 21 Aug 2002, Banai Zoltan wrote:
> Date: Wed, 21 Aug 2002 23:55:03 +0200 > From: Banai Zoltan <bazooka@emitel.hu> > To: Kelsey Hudson <khudson@compendium.us> > Cc: James Bourne <jbourne@mtroyal.ab.ca>, Hugh Dickins <hugh@veritas.com>, > "Reed, Timothy A" <timothy.a.reed@lmco.com>, > linux-kernel@vger.kernel.org > Subject: Re: Hyperthreading > > On Wed, Aug 21, 2002 at 02:16:11PM -0700, Kelsey Hudson wrote: > > On Wed, 21 Aug 2002, James Bourne wrote: > > > > > On Wed, 21 Aug 2002, Hugh Dickins wrote: > > > > > > > You do need CONFIG_SMP and a processor capable of HyperThreading, > > > > i.e. Pentium 4 XEON; but CONFIG_MPENTIUM4 is not necessary for HT, > > > > just appropriate to that processor in other ways. > > > > > > I was under the impression that the only CPU capable of hyperthreading was > > > the P4 Xeon. Is this not correct? I don't know of any other CPUs that > > > have the ht feature. > > > > This is currently correct, although I believe Intel has plans to release a > > Hyperthreading-capable version of its desktop P4. > > If this is correct, and there is not destop P4 capable of ht, > then what does mean the ht flag in cpuinfo? > > $cat /proc/cpuinfo > processor : 0 > vendor_id : GenuineIntel > cpu family : 15 > model : 1 > model name : Intel(R) Pentium(R) 4 CPU 1.70GHz > stepping : 2 > cpu MHz : 1694.907 > cache size : 256 KB > fdiv_bug : no > hlt_bug : no > f00f_bug : no > coma_bug : no > fpu : yes > fpu_exception : yes > cpuid level : 2 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge > mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm > bogomips : 3381.65 > ^^ In fact all PIV are capable of ht, but usually there is way to enable due to bioses and similar
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