From mboxrd@z Thu Jan 1 00:00:00 1970 From: Simon Braunschmidt Subject: Re: [QUESTION] 3 frequency steps for p3 on windows Date: Mon, 27 Jun 2005 16:04:37 +0200 Message-ID: <200506271604.37776.brasimon@web.de> References: <200505122253.18630.brasimon@web.de> <200505171711.45444.brasimon@web.de> Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <200505171711.45444.brasimon@web.de> Content-Disposition: inline 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=gmane.org@lists.linux.org.uk Content-Type: text/plain; charset="iso-8859-1" To: cpufreq@lists.linux.org.uk Hi again Any ideas about this?=20 At least some pointer about where to start investigating would be usefull, = so=20 i could start a the right place. Maybe you know off some tool to investigat= e=20 the system state state in winxp for comparison with linux? Greeting Simon Am Dienstag, 17. Mai 2005 17:11 schrieb Simon Braunschmidt: > Am Donnerstag, 12. Mai 2005 22:53 schrieb Simon Braunschmidt: > > Hi, > > > > I have a compaq armada m300 with a speedstep-enabled 600mhz pentium. > > It is running ubuntu so its essentialy a 2.6.10 kernel. > > Scaling the frequency dynamically works very good so far, i can choose > > between ~500mhz and ~600mhz. > > > > However, when i boot into windows xp sp2, after installing some enabler > > programm from the compaq website, the freqency of the cpu is scaled > > dynamically with the THREE steps ~413mhz, ~500mhz and ~600mhz, the exa= ct > > values for 500 and 600 being the same as in linux. > > > > So in windows i get an extra frequency option for 413mhz not available = in > > linux. > > > > Is there any chance of supporting this in linux? Since i only ever heard > > of 2 frequency steps for the early p3's, i think this will be a > > compaq-specific behaviour. Is compaq giving out documentation? > > > > please cc me > > > > Greetings > > Simon Braunschmidt > > After some (random) experimentation (changing from ac to battery while in > s3 state, maybe something more, didnt take notes, seems all unrelated), t= he > frequency steping in linux was ~415mhz and ~500mhz. The values > in /sys=AD=AD/.../cpufreq stayed the same, and the max. frequency was now > ~500mhz (the 600mhz diddnt seem to work anymore). > > This behaviour was gone after a reboot and i hadnt been able to reproduce > it, strange. > > So in principle it is possible under linux to use the "compaq 3 steps > behaviour", but the inner workings need to be understood. Any pointers > where i could start? > > Greetings > Simon Braunschmidt > > > simon@heimdal:/sys/devices/system/cpu/cpu0/cpufreq$ uname -a > > Linux heimdal 2.6.10-5-686 #1 Tue Apr 5 12:27:02 UTC 2005 i686 GNU/Linux > > > > simon@heimdal:/sys/devices/system/cpu/cpu0/cpufreq$ cat /proc/cpuinfo > > processor : 0 > > vendor_id : GenuineIntel > > cpu family : 6 > > model : 8 > > model name : Pentium III (Coppermine) > > stepping : 3 > > cpu MHz : 498.115 > > cache size : 256 KB > > fdiv_bug : no > > hlt_bug : no > > f00f_bug : no > > coma_bug : no > > fpu : yes > > fpu_exception : yes > > cpuid level : 2 > > wp : yes > > flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca > > cmov pat pse36 mmx fxsr sse > > bogomips : 986.45 > > > > simon@heimdal:/sys/devices/system/cpu/cpu0/cpufreq$ sudo cat * > > Password: > > 0 > > 500000 > > 600000 > > 500000 > > 600000 500000 > > userspace ondemand powersave performance > > 500000 > > speedstep-smi > > userspace > > 600000 > > 500000 > > 500000 > > simon@heimdal:/sys/devices/system/cpu/cpu0/cpufreq$