[Grml] AMILOPRO V2030 sluggish : cpu frequency modulation slow speedstep-centrino vs. p4-clockmod

Michael Prokop mika at grml.org
Tue Nov 21 21:46:25 CET 2006

* Erich Minderlein <erminderlein at locoware.de> [20061121 21:29]:

> cpufrequtils 002: cpufreq-info (C) Dominik Brodowski 2004-2006
>   Hardwarebedingte Grenzen der Taktfrequenz: 188 MHz - 1.50 GHz
>   mögliche Taktfrequenzen: 188 MHz, 375 MHz, 563 MHz, 750 MHz, 938 MHz,
> 1.13 GHz, 1.31 GHz, 1.50 GHz
>   mögliche Regler: userspace, performance
>   momentane Taktik: die Frequenz soll innerhalb 188 MHz und 1.50 GHz.
>                     liegen. Der Regler "userspace" kann frei
> entscheiden,
>                     welche Taktfrequenz innerhalb dieser Grenze
> verwendet wird.
>   momentane Taktfrequenz ist 188 MHz  (verifiziert durch Nachfrage bei
> der Hardware).

That looks OK for me - basically. Are powernowd or cpudyn running,

> this is not what we want !
> so the change of frequency is not allowed as I understand 

No, your system should adjust cpu frequency according to the needs.
Services like powernowd can handle that for you. You can adjust the
limits manually as well, see

If you do not want to use frequency scaling at all you just have to
unload the cpu-frequency modules of course.

But let's check whether your system really adjusts frequency
according to your needs. So just run cpuburn-in and take a look at
the current processor frequency (running cpu-screen,
cpufreq-info,... or just 'cat
/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq'). Is it still
at 188MHz is it increasing?

> uname -a :

> Linux amilopro 2.6.17-grml #1 SMP PREEMPT Tue Jul 25 10:57:35 CEST 2006
> i686 GNU/Linux

> Whover choose the smp for a single cpu lap top oris this double core ?


The SMP-alternatives feature of recent kernels allows use of SMP
enabled kernels on unicore systems, nothing to care about.

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