From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bruno Ducrot Subject: Re: [PATCH 2.6.14] cpufreq: don't suggest speedstep-centrino for Dothan-based Celeron-M processors Date: Tue, 6 Dec 2005 11:03:24 +0100 Message-ID: <20051206100324.GA14886@poupinou.org> References: <88056F38E9E48644A0F562A38C64FB60067F424F@scsmsx403.amr.corp.intel.com> <20051204164620.GA8422@isilmar.linta.de> <20051205110012.GA12747@poupinou.org> <20051206060149.GA4722@isilmar.linta.de> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <20051206060149.GA4722@isilmar.linta.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: cpufreq-bounces@lists.linux.org.uk Errors-To: cpufreq-bounces+glkc-cpufreq=m.gmane.org+glkc-cpufreq=m.gmane.org@lists.linux.org.uk Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: "Pallipadi, Venkatesh" , CPUFreq@lists.linux.org.uk, davej@redhat.com On Tue, Dec 06, 2005 at 07:01:49AM +0100, Dominik Brodowski wrote: > Hi, > > On Mon, Dec 05, 2005 at 12:00:12PM +0100, Bruno Ducrot wrote: > > > Yes, exactly. In my TODO list for cpufreq, I still have this entry: > > > - [core] evaluate use of > 1 drivers at one time (CPUFREQ_THROTTLING, > > > CPUFREQ_SCALING) > > > > Yes, that's what I had in mind. But maybe we could at first make the > > distinction before being able to load more than one driver? > > Yes, sure. However, only on the x86 I'm quite confident that the throttling > state is equivalent to the idle state, and therefore doesn't offer > _additional_ power savings (besides the effect discussed by Dave yesterday) > if the CPU load is lower than (1 - throttling_rate), IMO. > > CPUFREQ_SCALING: > acpi-cpufreq > elanfreq > powernow-k{6,7,8} > speedstep-{smi,ich,centrino} > longrun > longhaul > > CPUFREQ_THROTTLING: > p4-clockmod > gx-suspmod Well, there is the cpufreq-nvidia2 driver. I'm pretty sure that one does not fit there. I don't know what are exactly the benefits so far. > The other architectures I'm not so familiar with, so this list is x86 only > at the moment. Erm yes. Can't help here. -- Bruno Ducrot -- Which is worse: ignorance or apathy? -- Don't know. Don't care.