From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lists.gentoo.org ([140.105.134.102] helo=robin.gentoo.org) by nuthatch.gentoo.org with esmtp (Exim 4.43) id 1EJW8r-0000DD-Gy for garchives@archives.gentoo.org; Sun, 25 Sep 2005 13:02:06 +0000 Received: from robin.gentoo.org (localhost [127.0.0.1]) by robin.gentoo.org (8.13.5/8.13.5) with SMTP id j8PCrkci012073; Sun, 25 Sep 2005 12:53:46 GMT Received: from rockridge.uits.indiana.edu (rockridge.uits.indiana.edu [129.79.1.74]) by robin.gentoo.org (8.13.5/8.13.5) with ESMTP id j8PCrjig000351 for ; Sun, 25 Sep 2005 12:53:46 GMT Received: from iu-mssg-smtp02.ads.iu.edu (iu-mssg-smtp02.exchange.iu.edu [129.79.1.219]) by rockridge.uits.indiana.edu (8.12.10/8.12.10/IUPO) with ESMTP id j8PD0MtG026099 for ; Sun, 25 Sep 2005 08:00:23 -0500 (EST) Received: from iu-mssg-mbx09.ads.iu.edu ([129.79.1.238]) by iu-mssg-smtp02.ads.iu.edu with Microsoft SMTPSVC(5.0.2195.6713); Sun, 25 Sep 2005 08:00:24 -0500 X-MimeOLE: Produced By Microsoft Exchange V6.0.6603.0 content-class: urn:content-classes:message Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-server@gentoo.org Reply-to: gentoo-server@lists.gentoo.org MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----_=_NextPart_001_01C5C1D1.17C3B9A2" Subject: RE: [gentoo-server] HT on P4? Date: Sun, 25 Sep 2005 08:00:24 -0500 Message-ID: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [gentoo-server] HT on P4? Thread-Index: AcXBnEngoQ7DllKtRLemVgV6XrwAIAANLidU From: "Wilkins, Vern" To: X-OriginalArrivalTime: 25 Sep 2005 13:00:24.0379 (UTC) FILETIME=[17EEF8B0:01C5C1D1] X-Archives-Salt: cde36041-ecc3-49b9-9c41-9b330c38c75c X-Archives-Hash: 26481ba889f4a8038d83886beca40981 This is a multi-part message in MIME format. ------_=_NextPart_001_01C5C1D1.17C3B9A2 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable As someone else mentioned, my guess would be it's turned off on the = board. If there's no bios setting, how about a jumper on the board? = There has to be some way to turn it on/off. -----Original Message----- From: A. Khattri [mailto:ajai@bway.net] Sent: Sun 9/25/2005 1:36 AM To: gentoo-server@lists.gentoo.org Cc:=09 Subject: Re: [gentoo-server] HT on P4? On Fri, 23 Sep 2005, Joao Patricio wrote: > Did you enable SMP when you compiled your kernel? Both SMP and SMT are enabled in this kernel: # grep SMP /usr/src/linux/.config # CONFIG_X86_BIGSMP is not set CONFIG_SMP=3Dy CONFIG_X86_FIND_SMP_CONFIG=3Dy CONFIG_X86_SMP=3Dy # grep SMT /usr/src/linux/.config CONFIG_SCHED_SMT=3Dy > > Em Sexta, 23 de Setembro de 2005 23:05, o A. Khattri escreveu: > > On Fri, 23 Sep 2005, kashani wrote: > > > A. Khattri wrote: > > > > I switched on SMP and HT when building my kernel but I see this = among > > > > the boot messages: > > > > > > > > CPU: After generic identify, caps: bfebfbff 00000000 00000000 = 00000000 > > > > 0000441d 00000000 00000000 > > > > CPU: After vendor identify, caps: bfebfbff 00000000 00000000 = 00000000 > > > > 0000441d 00000000 00000000 > > > > monitor/mwait feature present. > > > > using mwait in idle threads. > > > > CPU: Trace cache: 12K uops, L1 D cache: 16K > > > > CPU: L2 cache: 1024K > > > > CPU: Hyper-Threading is disabled > > > > > > Is it possible it's disabled in the Bios? Some servers shipped = that way > > > when they first came out IIRC. > > > > I didn't find any BIOS setting unfortunately... > > > > This is a Supermicro 5013C-T server with a P4 (P4SCE?) board in it. > > > > # cat /proc/cpuinfo > > processor : 0 > > vendor_id : GenuineIntel > > cpu family : 15 > > model : 4 > > model name : Intel(R) Pentium(R) 4 CPU 2.40GHz > > stepping : 1 > > cpu MHz : 2395.003 > > cache size : 1024 KB > > fdiv_bug : no > > hlt_bug : no > > f00f_bug : no > > coma_bug : no > > fpu : yes > > fpu_exception : yes > > cpuid level : 5 > > 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 pbe pni = monitor > > ds_cpl cid xtpr > > bogomips : 4718.59 > > > > > > -- > --=20 wheel of reincarnation [coined in a paper by T. H. Myer and I.E. Sutherland "On the Design of Display Processors", Comm. ACM, Vol. 11, no. 6, June 1968)] Term used to refer to a well-known effect whereby function in a computing system family is migrated out to special-purpose peripheral hardware for speed, then the peripheral evolves toward more computing power as it does its job, then somebody notices that it is inefficient to support two asymmetrical processors in the architecture and folds the function back into the main CPU, at which point the cycle begins again. Several iterations of this cycle have been observed in graphics-processor design, and at least one or two in communications and floating-point processors. Also known as `the Wheel of Life', `the Wheel of Samsara', and other variations of the basic Hindu/Buddhist theological idea. 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