From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ducrot Bruno Subject: Re: Userspace: available processorspeeds Date: Mon, 6 Oct 2003 14:38:16 +0200 Sender: cpufreq-bounces@www.linux.org.uk Message-ID: <20031006123816.GP11391@poupinou.org> References: <3F81339D.6010305@ITS.TUDelft.nl> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <3F81339D.6010305@ITS.TUDelft.nl> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: cpufreq-bounces@www.linux.org.uk Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Jeroen Van der Vegt Cc: cpufreq@www.linux.org.uk On Mon, Oct 06, 2003 at 11:19:25AM +0200, Jeroen Van der Vegt wrote: > Hello, > > I'm trying to write a userspace processor-speed governor for my laptop, > an Asus L3000D. It has an AMD Athlon Mobile processor and runs on Linux > 2.6.0-test5 (and Debian unstable). > > For some reason, my laptop crashes when the speed changes from maximum > to minimum at once. So my program is to step the speed only to the next > level available. This is repeated every 5 seconds, so both the maximum > and minimum speed are reachable. Please be sure to upgrade to linux-2.6.0-test6 at least, due to some bugs in previous versions in powernow-k7. > The available speeds are printed when the module PowerNow is loaded, but > isn't there a 'better' way to retrieve this information? There doesn't > seem to be a file listing all possible speeds in either /proc nor /sys. > Have I overlooked a file perhaps, or is there some function call I can use? > > Besides this, I have experienced the following weirdness: according to > /sys/.../scaling_min_freq, my processor's minimum speed is 532 Mhz. I > have, however, had it running at 292Mhz (as reported by /proc/cpuinfo). Strange. Perhaps a bug somewhere in core? > It's not really reproducible unfortunately, and I only noticed it once > or twice.The laptops keeps working fine though, so it's not much of a > problem to that respect. Any actions I should take the next time I see it? Look what say bogomips, or x86info --mhz Cheers, -- Ducrot Bruno -- Which is worse: ignorance or apathy? -- Don't know. Don't care.