From owner-freebsd-current@FreeBSD.ORG Tue Aug 12 16:28:42 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 6D98337B401 for ; Tue, 12 Aug 2003 16:28:42 -0700 (PDT) Received: from odin.ac.hmc.edu (Odin.AC.HMC.Edu [134.173.32.75]) by mx1.FreeBSD.org (Postfix) with ESMTP id CA1A043F75 for ; Tue, 12 Aug 2003 16:28:41 -0700 (PDT) (envelope-from brdavis@odin.ac.hmc.edu) Received: from odin.ac.hmc.edu (IDENT:brdavis@localhost.localdomain [127.0.0.1]) by odin.ac.hmc.edu (8.12.9/8.12.3) with ESMTP id h7CNSd7c014997; Tue, 12 Aug 2003 16:28:39 -0700 Received: (from brdavis@localhost) by odin.ac.hmc.edu (8.12.9/8.12.3/Submit) id h7CNScBX014996; Tue, 12 Aug 2003 16:28:38 -0700 Date: Tue, 12 Aug 2003 16:28:38 -0700 From: Brooks Davis To: Stephane Raimbault Message-ID: <20030812232838.GA14311@Odin.AC.HMC.Edu> References: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="jI8keyz6grp/JLjh" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.4i X-Virus-Scanned: by amavisd-milter (http://amavis.org/) on odin.ac.hmc.edu cc: current@freebsd.org 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: Tue, 12 Aug 2003 23:28:42 -0000 --jI8keyz6grp/JLjh Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Aug 12, 2003 at 05:26:42PM -0600, Stephane Raimbault wrote: > Hi Brooks, >=20 > Thanks for responding... >=20 > However I'm confused by the terms used. Are you saying if I set it to 0,= I > would be using the processing power of all CPU's? I'm not sure how this > halted comes in to play, cuz the only thing that comes to mind is to halt > the machine as in shutdown.... I'm probably confusing terms here... can = you > expand and clarify? I just want to make sure what this all means. Also = is > this an option that can be modified via sysctl -w and the /etc/sysctl.conf > file ? Or is this going to have to be set in a boot option? When halted, the logical CPUs are rendered unavailable. This is the default. If you want the logical CPUs to work, you see the boolean sysctl to 0 telling the kernel to let them work. You can set the option any time you want. -- Brooks --jI8keyz6grp/JLjh Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQE/OXglXY6L6fI4GtQRAv1zAKDb6mIAcmU0lFxTqp4mM1nLsWHPdwCgsWHl zjgb8ZAGTuq7J5gRAveoIUQ= =se3R -----END PGP SIGNATURE----- --jI8keyz6grp/JLjh--