From owner-cvs-all Thu Jan 30 8:41:16 2003 Delivered-To: cvs-all@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 887FC37B405 for ; Thu, 30 Jan 2003 08:41:15 -0800 (PST) Received: from mail.speakeasy.net (mail11.speakeasy.net [216.254.0.211]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9C8C543F9B for ; Thu, 30 Jan 2003 08:41:14 -0800 (PST) (envelope-from jhb@FreeBSD.org) Received: (qmail 8681 invoked from network); 30 Jan 2003 16:41:17 -0000 Received: from unknown (HELO server.baldwin.cx) ([216.27.160.63]) (envelope-sender ) by mail11.speakeasy.net (qmail-ldap-1.03) with DES-CBC3-SHA encrypted SMTP for ; 30 Jan 2003 16:41:17 -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 h0UGfCUT068511; Thu, 30 Jan 2003 11:41:12 -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: <200301301638.h0UGcHZa082568@repoman.freebsd.org> Date: Thu, 30 Jan 2003 11:41:17 -0500 (EST) From: John Baldwin To: John Baldwin Subject: RE: cvs commit: src/sys/i386/i386 mp_machdep.c Cc: cvs-all@FreeBSD.org, cvs-committers@FreeBSD.org Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On 30-Jan-2003 John Baldwin wrote: > jhb 2003/01/30 08:38:17 PST > > Modified files: (Branch: RELENG_4) > sys/i386/i386 mp_machdep.c > Log: > MFC: Basic support for Hyperthreading. This uses the values from cpuid to > enmuerate logical CPUs. > > Requested heavily by: ps I highly recommend turning on machdep.cpu_idle_hlt for HTT boxes as it provides a noticable performance improvement. I'm still testing some other patches to rework the locking code in 4.x to make use of the pause instruction and be more intelligent about spinning on locks in general. -- 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 cvs-all" in the body of the message