From owner-freebsd-current@FreeBSD.ORG Tue Jan 6 07:30:44 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id EFDC616A4CE; Tue, 6 Jan 2004 07:30:44 -0800 (PST) Received: from mail-in.m-online.net (svr8.m-online.net [62.245.150.237]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7F5AA43D1F; Tue, 6 Jan 2004 07:30:42 -0800 (PST) (envelope-from h@schmalzbauer.de) Received: from mail.m-online.net (svr14.m-online.net [192.168.3.144]) by svr8.m-online.net (Postfix) with ESMTP id AE7B84665; Tue, 6 Jan 2004 16:30:41 +0100 (CET) Received: from cale.flintsbach.schmalzbauer.de (ppp-62-245-233-43.mnet-online.de [62.245.233.43]) by mail.m-online.net (Postfix) with ESMTP id 78365311D2; Tue, 6 Jan 2004 16:30:41 +0100 (CET) From: Harald Schmalzbauer To: John Baldwin Date: Tue, 6 Jan 2004 16:30:36 +0100 User-Agent: KMail/1.5.4 References: In-Reply-To: X-Birthday: 06 Oktober 1972 X-Name: Harald Schmalzbauer X-Phone1: +49 (0) 163 555 3237 X-Phone2: +49 (0) 89 18947781 X-Address: Munich, 80686 X-Country: Germany MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pgp-signature"; micalg=pgp-sha1; boundary="Boundary-02=_gSt+/w5BUDDzk/A"; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Message-Id: <200401061630.41005@harrymail> cc: freebsd-current@FreeBSD.org Subject: Re: some HTT questions X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Jan 2004 15:30:45 -0000 --Boundary-02=_gSt+/w5BUDDzk/A Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: quoted-printable Content-Description: signed data Content-Disposition: inline On Tuesday 06 January 2004 16:21, John Baldwin wrote: > On 06-Jan-2004 Harald Schmalzbauer wrote: > > Hi all, > > > > I'm currently working on my first P4 ever. > > I'm planning a colo production machine with FreeBSD 5.2 (RC2 atm). > > The info of dmesg about the CPU shows: > > > > CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (2394.13-MHz 686-class CPU) > > Origin =3D "GenuineIntel" Id =3D 0xf27 Stepping =3D 7 > > > > Features=3D0xbfebfbff >MCA,CMOV,PAT,PSE36,CLFLUS H,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> > > > > So I think this CPU should be HyperThreading capable which gets hardened > > by those lines: > > > > acpi_cpu0: on acpi0 > > acpi_cpu1: on acpi0 > > > > But the next line gives my an error about CPU1: > > > > device_probe_and_attach: acpi_cpu1 attach returned 6 > > > > This line shows up a second time between probing of sio and nxp0. > > > > Ny my guess was that HTT should be enabled in the BIOS but the BIOS has > > no entry about HTT. > > > > How can I use HTT and are my assumptions correct? > > Your assumptions are not correct. :) If your CPU does support HTT, then > the dmesg will include an extra line that says > ' Hyperthreading: X logical cpus'. The HTT Feature just means that we > can check to see if this CPU has more than one core. It might still The Feature=3D doesn't mean it supports HTT but means we are allowed t= o=20 check if it supports HyperThreading??? Well that's total control. Ok, then I have no HTT CPU and that's because the BIOS doesn't show the=20 HyperThreading menu. Thanks all, =2DHarry > only have one core enabled, however. Your BIOS has to support an HTT > CPU, thus, ACPI has two cpu devices in case you do have a HTT CPU. > However, only one is used in your system (acpi_cpu0) since your CPU > does not support HTT. --Boundary-02=_gSt+/w5BUDDzk/A Content-Type: application/pgp-signature Content-Description: signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.3 (FreeBSD) iD8DBQA/+tSgBylq0S4AzzwRAvh0AKCGrWf41+S2uiQFRJ3sHWC68cz1ZACfcfQw oky+yS49HLlOG949okHTqYE= =tFtt -----END PGP SIGNATURE----- --Boundary-02=_gSt+/w5BUDDzk/A--