From owner-freebsd-mobile@FreeBSD.ORG Tue Aug 17 06:59:30 2004 Return-Path: Delivered-To: freebsd-mobile@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id C261716A4CE for ; Tue, 17 Aug 2004 06:59:30 +0000 (GMT) Received: from zephon.secspace.de (zephon.secspace.de [62.75.136.210]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6793843D48 for ; Tue, 17 Aug 2004 06:59:30 +0000 (GMT) (envelope-from ml@ps102.de) Received: from ariel.office.volker.de (pD95F2779.dip.t-dialin.net [217.95.39.121]) by zephon.secspace.de (Postfix) with ESMTP id 961316EB3B for ; Tue, 17 Aug 2004 08:59:28 +0200 (CEST) Date: Tue, 17 Aug 2004 08:59:39 +0200 From: Volker Kindermann To: freebsd-mobile@freebsd.org Message-Id: <20040817085939.3a8dd948@ariel.office.volker.de> In-Reply-To: <6.1.0.6.1.20040816074348.03f99338@popserver.sfu.ca> References: <6.1.0.6.1.20040816074348.03f99338@popserver.sfu.ca> X-Mailer: Sylpheed-Claws 0.9.12 (GTK+ 1.2.10; i386-portbld-freebsd5.2.1) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: Re: Enhanced SpeedStep driver available X-BeenThere: freebsd-mobile@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Mobile computing with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 17 Aug 2004 06:59:30 -0000 Hi Colin, first, thanks for your great work! > I've also put together a very simple control daemon which > reads kern.cp_time every second and adjusts the cpu frequency > based on the fraction of cpu time which is idle. Is it possible to make that reading intervall smaller, e.g. half a second? Reason: in their latest release, german c't magazine (for computer technik) reports about linux on laptops. There's an utility called cpufreq which does similar work as your module. They say that check intervalls longer than half a second could make the system feel slow. I don't know if this affects only linux systems but perhaps it's worth testing. -volker