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Thread: cpu frequency scaling monitor

  1. #1
    Join Date
    May 2010
    Beans
    4

    Question cpu frequency scaling monitor

    I found how to change the processor speed of my Eee PC 701. It is modprobe p4-clockmod. Before the change it runs at 630 MHz and after at 900 MHz and I can change the cpu frequency with the applet to any of 900, 787, 675, 562, 450, 337, 225, 112 MHz. How to make the change permanent? Or better yet, to make it vary on demand?
    Code:
    $ cat /proc/cpuinfo
    processor    : 0
    vendor_id    : GenuineIntel
    cpu family    : 6
    model        : 13
    model name    : Intel(R) Celeron(R) M processor          900MHz
    stepping    : 8
    cpu MHz        : 630.181
    cache size    : 512 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 apic sep mtrr pge mca cmov clflush dts acpi mmx fxsr sse sse2 ss tm pbe nx up bts
    bogomips    : 1260.36
    clflush size    : 64
    cache_alignment    : 64
    address sizes    : 32 bits physical, 32 bits virtual
    power management:
    Code:
    # modprobe p4-clockmod
    Code:
     cat /proc/cpuinfo
    processor    : 0
    vendor_id    : GenuineIntel
    cpu family    : 6
    model        : 13
    model name    : Intel(R) Celeron(R) M processor          900MHz
    stepping    : 8
    cpu MHz        : 900.000
    cache size    : 512 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 apic sep mtrr pge mca cmov clflush dts acpi mmx fxsr sse sse2 ss tm pbe nx up bts
    bogomips    : 1260.36
    clflush size    : 64
    cache_alignment    : 64
    address sizes    : 32 bits physical, 32 bits virtual
    power management:

  2. #2
    Join Date
    May 2010
    Beans
    4

    Re: cpu frequency scaling monitor

    The answer is: install cpufreqd package

  3. #3
    Join Date
    Oct 2011
    Beans
    69
    Distro
    Lubuntu 12.04 Precise Pangolin

    Re: cpu frequency scaling monitor

    I've just got a used eee pc 701 4g laptop and after
    Code:
    modprobe p4-clockmod
    the
    Code:
    cat /proc/cpuinfo
    reports 900MHz but in fact it is false because CPU runs at a stock 630MHz.
    I ran this
    Code:
    time echo "scale=1500; 4*a(1)" | bc -l
    and there is no difference when using 900MHz or 630MHz speeds.

  4. #4
    Join Date
    Feb 2008
    Location
    Texas
    Beans
    14,472
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: cpu frequency scaling monitor

    If a post is older than a year or so and hasn't had a new reply in that time, instead of replying to it, create a new thread. In the software world, a lot can change in a very short time, and doing things this way makes it more likely that you will find the best information. You may link to the original discussion in the new thread if you think it may be helpful.

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