From owner-freebsd-current Fri Jan 31 12: 5:30 2003 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 7307437B407 for ; Fri, 31 Jan 2003 12:05:27 -0800 (PST) Received: from mail.speakeasy.net (mail13.speakeasy.net [216.254.0.213]) by mx1.FreeBSD.org (Postfix) with ESMTP id BB05743F43 for ; Fri, 31 Jan 2003 12:05:26 -0800 (PST) (envelope-from jhb@FreeBSD.org) Received: (qmail 4335 invoked from network); 31 Jan 2003 20:05:32 -0000 Received: from unknown (HELO server.baldwin.cx) ([216.27.160.63]) (envelope-sender ) by mail13.speakeasy.net (qmail-ldap-1.03) with DES-CBC3-SHA encrypted SMTP for ; 31 Jan 2003 20:05:32 -0000 Received: from laptop.baldwin.cx (gw1.twc.weather.com [216.133.140.1]) by server.baldwin.cx (8.12.6/8.12.6) with ESMTP id h0VK5OUT072755; Fri, 31 Jan 2003 15:05:24 -0500 (EST) (envelope-from jhb@FreeBSD.org) Message-ID: X-Mailer: XFMail 1.5.2 on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: <200301311908.h0VJ8cNZ007396@apollo.backplane.com> Date: Fri, 31 Jan 2003 15:05:30 -0500 (EST) From: John Baldwin To: Matthew Dillon Subject: Re: Hyperthreading and machdep.cpu_idle_hlt Cc: freebsd-current@FreeBSD.ORG, Trish Lynch , "Daniel C. Sobral" Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On 31-Jan-2003 Matthew Dillon wrote: > >:AFAIK, full hyperthreading support, as it is, has been merged to >:-stable. It consists of a patch to recognize the virtual CPUs, so they >:will be dealt with like any SMP system, as long as HTT is enabled on the >:BIOS. >: >:-- >:Daniel C. Sobral (8-DCS) >:Gerencia de Operacoes > > Yah. Shoot, well this Sony VAIO desktop has a P4 with HTT set in > it, but it doesn't have an APIC, the BIOS is clueless, and there > is no mptable, so I guess I am S.O.L. in regards to using hyperthreading > on this box. HTT set just means that you can check the value returned in %ebx from cpuid 1 to get the number of cores that your CPU contains. It most likely contains the value '1'. Only Xeons and very recent desktop P4's have multiple cores. -- John Baldwin <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message