From owner-freebsd-current@FreeBSD.ORG Thu Dec 11 14:39:28 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 4008D16A4D0 for ; Thu, 11 Dec 2003 14:39:28 -0800 (PST) Received: from rootlabs.com (root.org [67.118.192.226]) by mx1.FreeBSD.org (Postfix) with SMTP id 3A7F943DCA for ; Thu, 11 Dec 2003 14:12:55 -0800 (PST) (envelope-from nate@rootlabs.com) Received: (qmail 50943 invoked by uid 1000); 11 Dec 2003 22:12:56 -0000 Date: Thu, 11 Dec 2003 14:12:56 -0800 (PST) From: Nate Lawson To: current@freebsd.org In-Reply-To: <20031209175230.I44055@root.org> Message-ID: <20031211141205.X50937@root.org> References: <20031209175230.I44055@root.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: acpi-jp@jp.FreeBSD.org Subject: Re: [acpi-jp 2870] ACPI throttling changes 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: Thu, 11 Dec 2003 22:39:28 -0000 On Tue, 9 Dec 2003, Nate Lawson wrote: > I'm working on a shared CPU frequency control driver. One step is to > remove some of the autonomy of the throttling portion of acpi_cpu. > Please test this patch if you have a machine which supports throttling. > With this patch, throttling can be changed by doing: > > sysctl hw.acpi.cpu.current_speed=X > > where X is some number between 1 and hw.acpi.cpu.max_speed. It is no > longer driven by AC line transitions. Run a CPU benchmark like this one > to make sure the throttling transition still works with this patch. > > dd if=/dev/zero bs=1m count=500 | md5 > > This is part of a larger work. Don't worry, it won't be committed until > general CPU frequency control is done so no loss of functionality will be > committed. Haven't gotten any responses to this yet. Would someone who has working throttling support apply the patch and test that they can indeed change throttling through the sysctl listed above? Thanks, Nate