From owner-freebsd-current@FreeBSD.ORG Tue Aug 12 20:10:34 2003 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 639D837B401 for ; Tue, 12 Aug 2003 20:10:34 -0700 (PDT) Received: from ztxmail03.ztx.compaq.com (ztxmail03.ztx.compaq.com [161.114.1.207]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8167743FBD for ; Tue, 12 Aug 2003 20:10:33 -0700 (PDT) (envelope-from john.cagle@hp.com) Received: from cceexg13.americas.cpqcorp.net (cceexg13.americas.cpqcorp.net [16.110.250.119]) by ztxmail03.ztx.compaq.com (Postfix) with ESMTP id 51E33C476; Tue, 12 Aug 2003 20:33:58 -0500 (CDT) Received: from cceexc19.americas.cpqcorp.net ([16.110.250.85]) by cceexg13.americas.cpqcorp.net with Microsoft SMTPSVC(5.0.2195.6673); Tue, 12 Aug 2003 20:33:58 -0500 X-MimeOLE: Produced By Microsoft Exchange V6.0.6375.0 content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Date: Tue, 12 Aug 2003 20:33:57 -0500 Message-ID: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: Dual P4 2.4Ghz Xeon With Hyperthreading enabled... Thread-Index: AcNhOO+J+Fm+K+UmSFexxJl2WKvDQwAAbDNQ From: "Cagle, John (ISS-Houston)" To: "Scott M. Likens" , "Brooks Davis" X-OriginalArrivalTime: 13 Aug 2003 01:33:58.0097 (UTC) FILETIME=[F7449410:01C3613A] cc: current@freebsd.org Subject: RE: Dual P4 2.4Ghz Xeon With Hyperthreading enabled... 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: Wed, 13 Aug 2003 03:10:34 -0000 I think the valid settings are only 0 or 1, with the default being 1 which will disable all logical CPUs. If you want to enable the extra logical CPUS, then set it to 0 (zero). They will come online immediately. -------------------------------- John Cagle john.cagle@hp.com Principal Member Technical Staff Industry Standard Servers Hewlett-Packard Company > -----Original Message----- > From: Scott M. Likens [mailto:damm@fpsn.net]=20 > Sent: Tuesday, August 12, 2003 8:19 PM > To: Brooks Davis > Cc: current@freebsd.org > Subject: Re: Dual P4 2.4Ghz Xeon With Hyperthreading enabled... >=20 >=20 > On Tue, 2003-08-12 at 15:41, Brooks Davis wrote: > > On Tue, Aug 12, 2003 at 03:38:29PM -0700, Scott M. Likens wrote: > > > Well friend of mine just landed a Dual P4 2.4Ghz Xeon with > > > Hyperthreading Enabled, and yet I know there's a=20 > hyperthreading option > > > in 4.8-RELEASE but I don't see one at ALL in 5.1? > > >=20 > > > am I suddenly blind or do I need to cvsup to CURRENT to=20 > take proper > > > advantage? > >=20 > > There is no option in current. Instead, you use the sysctl > > machdep.hlt_logical_cpus to indicate if you want to use the logical > > cpus. > >=20 > > -- Brooks >=20 > For clarification, setting this to 2 would mean 2 processor's to > process? >=20 > Thanks. >=20 > --=20 > "I think we ought to be out there doing what we do best - making large > holes in other people's countries." - George Carlin >=20 >=20