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Thread: CPU policy governor

  1. #1
    Join Date
    Apr 2007

    CPU policy governor

    My cpufreq was not activate by default, and researching I found this doc

    I could load the frequency driver, but I couldn't the CPU policy governor because don't exist.
    I am running ubuntu 9.10 i386 on HP/Compaq nx9600

    $ dmesg | grep ubuntu
    [ 0.000000] Linux version 2.6.31-14-generic (buildd@rothera) (gcc version 4.4.1 (Ubuntu 4.4.1-4ubuntu8) ) #48-Ubuntu SMP Fri Oct 16 14:04:26 UTC 2009 (Ubuntu 2.6.31-14.48-generic)
    $ lsmod | grep p4
    p4_clockmod 4164 0
    $ cpufreq-info
    cpufrequtils 005: cpufreq-info (C) Dominik Brodowski 2004-2006
    Report errors and bugs to, please.
    analyzing CPU 0:
    driver: p4-clockmod
    CPUs which need to switch frequency at the same time: 0
    hardware limits: 375 MHz - 3.00 GHz
    available frequency steps: 375 MHz, 750 MHz, 1.13 GHz, 1.50 GHz, 1.88 GHz, 2.25 GHz, 2.63 GHz, 3.00 GHz
    available cpufreq governors: conservative, ondemand, userspace, powersave, performance
    current policy: frequency should be within 375 MHz and 3.00 GHz.
    The governor "performance" may decide which speed to use
    within this range.
    current CPU frequency is 3.00 GHz.
    cpufreq stats: 375 MHz:0.00%, 750 MHz:0.00%, 1.13 GHz:0.00%, 1.50 GHz:0.00%, 1.88 GHz:0.00%, 2.25 GHz:0.00%, 2.63 GHz:0.00%, 3.00 GHz:0.00%
    $ sudo modprobe cpufreq_conservative
    [sudo] password for user:
    FATAL: Module cpufreq_conservative not found.
    $ ls /lib/modules/
    ls: cannot access /lib/modules/ No such file or directory

    The cpu policy governor modules are not present in my system, and don't know how add them. Thanks in advance.

  2. #2
    Join Date
    Jan 2005
    United States
    Ubuntu 10.04 Lucid Lynx

    Re: CPU policy governor

    Friendly bump.
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  3. #3
    Join Date
    Apr 2010

    Re: CPU policy governor

    afaik that needs to be enabled when the kernel is built - what does
    cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies

  4. #4
    wojox is offline I Ubuntu, Therefore, I Am
    Join Date
    Apr 2009

    Re: CPU policy governor

  5. #5
    Join Date
    Aug 2008

    Re: CPU policy governor

    Thank you wojox that worked for me on that link you provided, I am using ubuntu 10.10 Maverick and was having all the same issues and this solved every thing for me.

  6. #6
    Join Date
    Apr 2007

    Re: CPU policy governor

    This issue was fixed in some kernel update that came before.
    Thanks people.

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