From owner-freebsd-current@FreeBSD.ORG Wed Aug 13 08:34:54 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 4605037B401 for ; Wed, 13 Aug 2003 08:34:54 -0700 (PDT) Received: from mail.speakeasy.net (mail9.speakeasy.net [216.254.0.209]) by mx1.FreeBSD.org (Postfix) with ESMTP id 97ABF43FBF for ; Wed, 13 Aug 2003 08:34:53 -0700 (PDT) (envelope-from jhb@FreeBSD.org) Received: (qmail 16964 invoked from network); 13 Aug 2003 15:34:52 -0000 Received: from unknown (HELO server.baldwin.cx) ([216.27.160.63]) (envelope-sender )encrypted SMTP for ; 13 Aug 2003 15:34:53 -0000 Received: from laptop.baldwin.cx (gw1.twc.weather.com [216.133.140.1]) by server.baldwin.cx (8.12.9/8.12.9) with ESMTP id h7DFYp9s061137; Wed, 13 Aug 2003 11:34:51 -0400 (EDT) (envelope-from jhb@FreeBSD.org) Message-ID: X-Mailer: XFMail 1.5.4 on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: <20030813123415.GB6964@slytherin.ds.psu.edu> Date: Wed, 13 Aug 2003 11:35:14 -0400 (EDT) From: John Baldwin To: "Dr. Richard E. Hawkins" cc: current@freebsd.org cc: "Scott M. Likens" 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 15:34:54 -0000 On 13-Aug-2003 Dr. Richard E. Hawkins wrote: > On Tue, Aug 12, 2003 at 08:33:57PM -0500, Cagle, John (ISS-Houston) wrote: >> 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. > > > > That can't be right. I've never done anything to configure the logical > cpus on mine; they just showed up unexpectedly when i switched from > stable to current. Now I have: > > slytherin ttyp1:hawk>sysctl -a | grep cpu > kern.threads.virtual_cpu: 4 > kern.ccpu: 1948 > kern.smp.cpus: 4 > hw.ncpu: 4 > machdep.cpu_idle_hlt: 1 > machdep.hlt_cpus: 10 > machdep.hlt_logical_cpus: 1 > machdep.logical_cpus_mask: 10 > > > It launches four logical cpus all on it's own. It did panic during > shutdown yesterday; If I read the messages right as it flashed by, it > was because cpu#2 got the shutdown order. Your logical CPU's aren't doing anything though, even though they are started up. John's explanation is correct. -- John Baldwin <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/