Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 22 Aug 2002 04:01:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 22 Aug 2002 04:01:38 -0400 Received: from cibs9.sns.it ([192.167.206.29]:33293 "EHLO cibs9.sns.it") by vger.kernel.org with ESMTP id ; Thu, 22 Aug 2002 04:01:37 -0400 Date: Thu, 22 Aug 2002 10:05:24 +0200 (CEST) From: venom@sns.it To: Banai Zoltan cc: Kelsey Hudson , James Bourne , Hugh Dickins , "Reed, Timothy A" , Subject: Re: Hyperthreading In-Reply-To: <20020821215503.GC1669@bazooka.saturnus.vein.hu> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2191 Lines: 60 On Wed, 21 Aug 2002, Banai Zoltan wrote: > Date: Wed, 21 Aug 2002 23:55:03 +0200 > From: Banai Zoltan > To: Kelsey Hudson > Cc: James Bourne , Hugh Dickins , > "Reed, Timothy A" , > 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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/