Topic
  • 3 replies
  • Latest Post - ‏2009-08-11T02:12:32Z by SystemAdmin
SystemAdmin
SystemAdmin
2402 Posts

Pinned topic Support for Linux CPU Speed Scaling?

‏2009-08-05T23:30:05Z |
Any way with Nmon to monitor processor clock speed under Linux when the cpufreq system is enabled to dynamically change clock speed to save power?

I.E.

cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
Updated on 2009-08-11T02:12:32Z at 2009-08-11T02:12:32Z by SystemAdmin
  • nagger
    nagger
    1672 Posts

    Re: Support for Linux CPU Speed Scaling?

    ‏2009-08-06T23:10:35Z  
    Sounds like a good idea.
    If you have a machine operating this way can you cut'n'paste a copy of that file so we can take a look.
    Is there one file per CPU?
    Could the files be different?

    thanks Nigel
  • SystemAdmin
    SystemAdmin
    2402 Posts

    Re: Support for Linux CPU Speed Scaling?

    ‏2009-08-07T19:36:10Z  
    • nagger
    • ‏2009-08-06T23:10:35Z
    Sounds like a good idea.
    If you have a machine operating this way can you cut'n'paste a copy of that file so we can take a look.
    Is there one file per CPU?
    Could the files be different?

    thanks Nigel
    Nigel,

    IBM has a good write-up here:

    http://publib.boulder.ibm.com/infocenter/lnxinfo/v3r0m0/index.jsp?topic=/liaai/cpufreq/liaai-cpufreq.htm

    We're setting up a test on RHEL for next week. I'll let you know if anything interesting shows up.

    The IBM docs are RH-centric. I believe SUSE uses the same /proc/ structure, but haven't confirmed that.

    The standard governors require 2.6.12.

    Ron
  • SystemAdmin
    SystemAdmin
    2402 Posts

    Re: Support for Linux CPU Speed Scaling?

    ‏2009-08-11T02:12:32Z  
    Hey all! Have a nice day

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