From owner-freebsd-questions@FreeBSD.ORG Sat Dec 13 16:20:29 2003 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 0759716A572 for ; Sat, 13 Dec 2003 16:20:28 -0800 (PST) Received: from smtp015.mail.yahoo.com (smtp015.mail.yahoo.com [216.136.173.59]) by mx1.FreeBSD.org (Postfix) with SMTP id 0C07F43E70 for ; Sat, 13 Dec 2003 16:15:08 -0800 (PST) (envelope-from mnslinky@yahoo.com) Received: from unknown (HELO Nomad) (mnslinky@66.41.18.160 with login) by smtp015.mail.yahoo.com with SMTP; 14 Dec 2003 00:13:56 -0000 From: "Minnesota Slinky" To: "'Stefan Cars'" , "'Rob'" Date: Sat, 13 Dec 2003 18:12:38 -0600 Message-ID: <003601c3c1d7$004b9a70$6401a8c0@Nomad> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2616 In-Reply-To: <20031213195759.4A20F75D6@mail.snowfall.se> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal cc: questions@freebsd.org Subject: RE: Need help: HyperThreading-CPU + FreeBSD-Stable + Multi-threading 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: Sun, 14 Dec 2003 00:20:31 -0000 I _believe_ there is an options HT #for HyperThreading In the kernel configuration. HTH Eric F Crist President AdTech Integrated Systems, Inc (612) 998-3588 -----Original Message----- From: owner-freebsd-questions@freebsd.org [mailto:owner-freebsd-questions@freebsd.org] On Behalf Of Stefan Cars Sent: Saturday, December 13, 2003 1:58 PM To: 'Rob' Cc: questions@freebsd.org Subject: RE: Need help: HyperThreading-CPU + FreeBSD-Stable + Multi-threading Hi! This is strange, my system doesn't even show mchdep.hlt_logical_cpus, very weird. My system have HT /S -----Original Message----- From: owner-freebsd-questions@freebsd.org [mailto:owner-freebsd-questions@freebsd.org] On Behalf Of Rob Sent: den 12 december 2003 15:58 To: freebsd-questions@freebsd.org Subject: Need help: HyperThreading-CPU + FreeBSD-Stable + Multi-threading Hello, Recently I've got a new PC: P4 Titan 2.6 GHz. It says in the brochure that it has "HyperThreading", which I think is somehow related to the HyperThread thing in the FreeBSD kernel, right? I know there's this message in /usr/src/UPDATING, which unfortunately does not clear up the matter for me. So let me recap what I believe to understand: For utilizing the advantages of this HyperThreading stuff for users, I need in the kernel configuration: options SMP # Symmetric MultiProcessor Kernel options APIC_IO # Symmetric (APIC) I/O Furthermore, I need to set "machdep.hlt_logical_cpus" to 0 (zero). How do I add this to "the loader" so that it is set to zero at every boot up? Should I simply add to my /boot/loader.conf a line like: machdep.hlt_logical_cpus="0" After that, I'm done with the hyperthreading? Thanks, Rob. PS: if you're in the mood, I would appreciate a few words on what this HyperThreading is about and what advantages I can expect. Thanks too! _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"