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Thread: [PPC] - Hardy frequency-scaling - working for you?

  1. #1
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    [PPC] - Hardy frequency-scaling - working for you?

    Just wondering how frequency scaling with the default powernowd is working for anybody?

    After installation, I like to make sure that frequency scaling is working by using the cpu frequency-monitoring applets, or doing it manually by letting the system settle for a little bit and doing
    Code:
    cat /proc/cpuinfo
    I found that on my G5 iMac, it was always running at full-tilt at 1.8ghz, even with powernowd installed by default.

    To fix this so that it would scale back to 900mhz when not doing much of anything, I had to use CPUDYN as my frequency scaler instead.

    Anyone else having any problems with powernowd not doing frequency scaling on a default Hardy?
    Last edited by stream303; May 3rd, 2008 at 09:00 AM. Reason: cpu typo
    20" G5 iMac - AMD64 HP desktop
    http://www.ppclinux.info/

  2. #2
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    Re: [PPC] - Hardy frequency-scaling - working for you?

    Intel Core2Duo in a Lenovo laptop also runs full tilt with no apps running (both cores). The CPU scaling monitor reports "frequency scaling not supported." Strange, as it worked perfectly in Feisty

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    Re: [PPC] - Hardy frequency-scaling - working for you?

    Wow, that's interesting even though you are running an intel box. I wonder how many might not even realize that their boxes are running hot due to this?

    Have you tried uninstalling powernowd, and using another scaler, like cpudyn?
    20" G5 iMac - AMD64 HP desktop
    http://www.ppclinux.info/

  4. #4
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    Re: [PPC] - Hardy frequency-scaling - working for you?

    Stream:
    Interesting, indeed. More interesting is that fooling around trying to cix it, I installed some things that had configuration conflicts, making it worse. The idle core tem was over 70 C which is unreasonable.

    I also lost my internet connection for a few days, so I did a complete fresh install. The processor no longer locked at max speed, but did spend a lot of time up there when it should have been idle.

    Powernowd said that it was set at mode 1 (aggressive) (default) and I blame that setting, mostly. I have manually reset it to "2" which is "passive" and it seems to run cooler (52-53 C) . I have no idea what the setting 0 (SINE) or 3 (LEAP) translate to in human terms.

    If anyone is reading this, run sudo powernowd -vv -d to see what is going on. You get hints on screen on how to change settings.

    I don't yet know if those changes are persistent, since I have not rebooted yet.

  5. #5
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    Re: [PPC] - Hardy frequency-scaling - working for you?

    Quote Originally Posted by stream303 View Post
    Just wondering how frequency scaling with the default powernowd is working for anybody?

    After installation, I like to make sure that frequency scaling is working by using the cpu frequency-monitoring applets, or doing it manually by letting the system settle for a little bit and doing
    Code:
    cat /proc/cpuinfo
    I found that on my G5 iMac, it was always running at full-tilt at 1.8ghz, even with powernowd installed by default.

    To fix this so that it would scale back to 900mhz when not doing much of anything, I had to use CPUDYN as my frequency scaler instead.

    Anyone else having any problems with powernowd not doing frequency scaling on a default Hardy?
    THANK YOU!!!

    Code:
    sudo apt-get remove powernowd
    removed the unworking CPU / Processor scaling.

    Code:
    sudo apt-get install cpudyn
    installed the working CPU / Processor scaling! As soon as I installed this the CPU usage monitor instantly started showing the speed monitor go up and down!

    This is on a G4 ibook 1.46mhz processor.
    -user error

    | I enjoy Linux! | Using 64bit Ubuntu! |

  6. #6
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    Re: [PPC] - Hardy frequency-scaling - working for you?

    I've got a, "Me, too," here.

    Thanks. After installing cpudyn (which automatically removes powernowd), the frequency scaling kicked in straight away on my iBook 1.33GHz.

    J

  7. #7
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    Re: [PPC] - Hardy frequency-scaling - working for you?

    It is even simpler now - you just have to start the process to install cpudyn, and it will automatically remove powernowd for you - and it's just as easy to switch back - just install powernowd, and cpudyn is gone.

    Note that powernowd can be fixed with an edit to the /etc/init.d/powernowd file:

    https://wiki.ubuntu.com/PowerPCKnownIssues

    (see about half-way down the page) if you'd prefer that. I still prefer the lower latency of cpudyn after experimenting with the two.
    20" G5 iMac - AMD64 HP desktop
    http://www.ppclinux.info/

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