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Thread: HOWTO: CPU Frequency Scaling w/ Kernel Module

  1. #41
    Join Date
    May 2005
    Location
    Sydney, Australia
    Beans
    9
    Distro
    Ubuntu 6.10 Edgy

    Re: HOWTO: CPU Frequency Scaling w/ Kernel Module

    Hey guys..

    IS this how-to the best way to get my AMD X2 4600+ up to speed on my EDGY AMD64 install?

    She's running at half pace


    processor : 0
    vendor_id : AuthenticAMD
    cpu family : 15
    model : 75
    model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4600+
    stepping : 2
    cpu MHz : 1000.000
    cache size : 512 KB
    physical id : 0
    siblings : 2
    core id : 0
    cpu cores : 2
    fpu : yes
    fpu_exception : yes
    cpuid level : 1
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow up pni cx16 lahf_lm cmp_legacy svm cr8_legacy
    bogomips : 2011.80
    TLB size : 1024 4K pages
    clflush size : 64
    cache_alignment : 64
    address sizes : 40 bits physical, 48 bits virtual
    power management: ts fid vid ttp tm stc

    processor : 1
    vendor_id : AuthenticAMD
    cpu family : 15
    model : 75
    model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4600+
    stepping : 2
    cpu MHz : 1000.000
    cache size : 512 KB
    physical id : 0
    siblings : 2
    core id : 1
    cpu cores : 2
    fpu : yes
    fpu_exception : yes
    cpuid level : 1
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow up pni cx16 lahf_lm cmp_legacy svm cr8_legacy
    bogomips : 2011.80
    TLB size : 1024 4K pages
    clflush size : 64
    cache_alignment : 64
    address sizes : 40 bits physical, 48 bits virtual
    power management: ts fid vid ttp tm stc
    Last edited by pixelboy; December 24th, 2006 at 05:31 AM.

  2. #42
    Join Date
    Apr 2006
    Beans
    49
    Distro
    Xubuntu

    Re: HOWTO: CPU Frequency Scaling w/ Kernel Module

    Quote Originally Posted by Lomz View Post
    Hi

    thanks for a wonderfull howto, mi problem is that when I restart the computer it seems like it somehow doest remember this settings, and I need to run all the commands again.
    And I am not using a live cd...

    Anybody has an idea about how to solve this?
    Nobody knows?

  3. #43
    Join Date
    Jan 2007
    Beans
    93

    Re: HOWTO: CPU Frequency Scaling w/ Kernel Module

    If I use this method for frequency scaling, instead of the default use of powernowd, is there a way to automatically have different settings when on ac and when on battery? I want to use ondemand for ac and conservative for battery.

    Also, does this method mean that the settings in the Power Management Preferences window no longer do anything? Should those settings, especially "prefer power savings over performance," be turned off in order not to conflict with the frequency governor set up in this how-to?

    Thanks.

  4. #44
    Join Date
    Feb 2006
    Location
    Orlando Florida
    Beans
    278
    Distro
    Ubuntu 7.10 Gutsy Gibbon

    Re: HOWTO: CPU Frequency Scaling w/ Kernel Module

    I used this when I had dapper on my machine, and it worked. I was able to throttle my cpu from 300 MHz, up to 2.8 GHz. I found that going lower than 1 GHz didn't increase battery life, but I used 1.4 when I was on batteries. I used the instructions from the Ubuntu document storage facility, but that site no longer comes up.

    I upgraded to edgy, but now when I try to modprobe speedstep-centrino, it give me there error (not found). I tried the acpi one too, but no luck.

    I know frequency scaling works on this computer, but with the upgrade to edgy, I can't get it going.
    I'm not lazy! I'm a Personal Energy Conservationist!
    My Blog

  5. #45
    Join Date
    Feb 2006
    Location
    Orlando Florida
    Beans
    278
    Distro
    Ubuntu 7.10 Gutsy Gibbon

    Re: HOWTO: CPU Frequency Scaling w/ Kernel Module

    Quote Originally Posted by bodycoach2 View Post
    I used this when I had dapper on my machine, and it worked. I was able to throttle my cpu from 300 MHz, up to 2.8 GHz. I found that going lower than 1 GHz didn't increase battery life, but I used 1.4 when I was on batteries. I used the instructions from the Ubuntu document storage facility, but that site no longer comes up.

    I upgraded to edgy, but now when I try to modprobe speedstep-centrino, it give me there error (not found). I tried the acpi one too, but no luck.

    I know frequency scaling works on this computer, but with the upgrade to edgy, I can't get it going.
    Ubuntu Document Storage Facility is back up. I found the answer:

    sudo modprobe p4_clockmod
    Frequency scaling is working. Most excellent.
    I'm not lazy! I'm a Personal Energy Conservationist!
    My Blog

  6. #46
    Join Date
    Oct 2006
    Beans
    22

    Re: HOWTO: CPU Frequency Scaling w/ Kernel Module

    I am having the same problem with the clock speed being stuck at 1Ghz. I followed the steps and everything was working great until I restarted. After I restarted the CPU freq was stuck at 1Ghz. I ran through the steps again with no success. I tried to run $sudo modprobe p4_clockmod and got the following error "FATAL: Error inserting p4_clockmod (/lib/modules/2.6.17-11-386/kernel/arch/i386/kernel/cpu/cpufreq/p4-clockmod.ko): Device or resource busy" Do I need to kill some process before I attempt to run that command? Thanks for any help you guys have.

  7. #47
    Join Date
    Oct 2006
    Beans
    22

    Re: HOWTO: CPU Frequency Scaling w/ Kernel Module

    I should have posted this above, this is my CPU information:

    Intel Core Duo
    processor: 0
    vendor_id: GenuineIntel
    cpu family: 6
    model: 14
    model name: Genuine Intel(R) CPU T2400 @ 1.83GHz
    stepping: 8
    cpu MHz: 1000.000
    cache size: 2048 KB
    fdiv_bug: no
    hlt_bug: no
    f00f_bug: no
    coma_bug: no
    fpu: yes
    fpu_exception: yes
    cpuid level: 10
    wp: yes
    flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc up pni monitor vmx est tm2 xtpr
    bogomips: 3661.77

  8. #48
    Join Date
    May 2005
    Location
    Potsdam
    Beans
    26
    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: HOWTO: CPU Frequency Scaling w/ Kernel Module

    pharcyde,

    You might also want to point out to your duller readers that if they have dual cores, they should repeat the governor setting for each core. (Would have helped me.)

  9. #49
    Join Date
    Oct 2006
    Beans
    22

    Re: HOWTO: CPU Frequency Scaling w/ Kernel Module

    Yeah I have instances of the scaling_governor for each cpu, so that's not the problem. Still need input on how to fix the scaling support.

  10. #50
    Join Date
    Mar 2007
    Location
    Iceland
    Beans
    3
    Distro
    Ubuntu 6.10 Edgy

    Re: HOWTO: CPU Frequency Scaling w/ Kernel Module

    Hi

    I'm a super-noob, and I don't quite understand step 6. Could someone maybe explain it a little better for me, perhaps with an example of what to type in at the kernel?

    Thanks in advance!

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