From owner-freebsd-stable@FreeBSD.ORG Fri Jan 13 00:18:52 2006 Return-Path: <owner-freebsd-stable@FreeBSD.ORG> X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2EA5B16A41F for <freebsd-stable@freebsd.org>; Fri, 13 Jan 2006 00:18:52 +0000 (GMT) (envelope-from ducrot@poupinou.org) Received: from poup.poupinou.org (poup.poupinou.org [195.101.94.96]) by mx1.FreeBSD.org (Postfix) with ESMTP id C370643D48 for <freebsd-stable@freebsd.org>; Fri, 13 Jan 2006 00:18:51 +0000 (GMT) (envelope-from ducrot@poupinou.org) Received: from ducrot by poup.poupinou.org with local (Exim) id 1ExCeQ-0004TV-00; Fri, 13 Jan 2006 01:18:42 +0100 Date: Fri, 13 Jan 2006 01:18:42 +0100 To: Daniel O'Connor <doconnor@gsoft.com.au> Message-ID: <20060113001842.GB16467@poupinou.org> References: <43C5A261.1020407@rogers.com> <200601131010.59992.doconnor@gsoft.com.au> <20060112235415.GA16467@poupinou.org> <200601131027.38149.doconnor@gsoft.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200601131027.38149.doconnor@gsoft.com.au> User-Agent: Mutt/1.5.9i From: Bruno Ducrot <ducrot@poupinou.org> Cc: Mike Jakubik <mikej@rogers.com>, freebsd-stable@freebsd.org Subject: Re: powerd effectiveness X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org> List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, <mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable> List-Post: <mailto:freebsd-stable@freebsd.org> List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help> List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, <mailto:freebsd-stable-request@freebsd.org?subject=subscribe> X-List-Received-Date: Fri, 13 Jan 2006 00:18:52 -0000 On Fri, Jan 13, 2006 at 10:27:37AM +1030, Daniel O'Connor wrote: > On Fri, 13 Jan 2006 10:24, Bruno Ducrot wrote: > > > Nearly all of the energy going into the CPU is disipated as heat. > > > > Of course. But the goal of powerd is to reduce power comsuption with > > nearly no visible impact on performance. This imply that if the > > runpercent is nearly 100%, then the processor will be put to full > > frequency even though this can imply an overheat situation. > > The role of acpi_thermal is to reduce frequency if the processor is > > too hot, and this imply performance loss if runpercent is high. > > Yes, but the original poster was wondering why their CPU temperature didn't go > down when the clock was (allegedly) very slow. Maybe because the bus disconnect feature on the northbridge is not enabled, and then the processor does not enter a low-power state upon assertion of STPCLK# I think. -- Bruno Ducrot -- Which is worse: ignorance or apathy? -- Don't know. Don't care.