From owner-freebsd-questions@FreeBSD.ORG Wed Jan 12 05:24:58 2005 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id C84DB16A4CE for ; Wed, 12 Jan 2005 05:24:58 +0000 (GMT) Received: from mail.cs.ait.ac.th (mail.cs.ait.ac.th [192.41.170.16]) by mx1.FreeBSD.org (Postfix) with ESMTP id ABB5B43D31 for ; Wed, 12 Jan 2005 05:24:57 +0000 (GMT) (envelope-from on@cs.ait.ac.th) Received: from mail.cs.ait.ac.th (localhost.cs.ait.ac.th [127.0.0.1]) by mail.cs.ait.ac.th (8.12.11/8.12.11) with ESMTP id j0C5OuZY084918 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 12 Jan 2005 12:24:56 +0700 (ICT) Received: (from on@localhost) by mail.cs.ait.ac.th (8.12.11/8.12.11/Submit) id j0C5OuwT084915; Wed, 12 Jan 2005 12:24:56 +0700 (ICT) Date: Wed, 12 Jan 2005 12:24:56 +0700 (ICT) Message-Id: <200501120524.j0C5OuwT084915@mail.cs.ait.ac.th> From: Olivier Nicole Cc: freebsd-questions@freebsd.org In-reply-to: <509984787.20050112062118@wanadoo.fr> (message from Anthony Atkielski on Wed, 12 Jan 2005 06:21:18 +0100) X-Virus-Scanned: on CSIM by amavisd-milter (http://www.amavis.org/) Subject: Re: Hyperthreading hurts 5.3? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 12 Jan 2005 05:24:58 -0000 > Is a hyperthreading CPU identical to a second CPU from the software's > standpoint? If not, what are the differences? I am not sure, but it is some how detected as 2 CPUs FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs cpu0 (BSP): APIC ID: 0 cpu1 (AP): APIC ID: 1 cpu2 (AP): APIC ID: 6 cpu3 (AP): APIC ID: 7 Olivier