[Bug 54221] New: ondemand cpufeq governor do not notice Node Manager power limit change

[Bug 54221] New: ondemand cpufeq governor do not notice Node Manager power limit change

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=54221

           Summary: ondemand cpufeq governor do not notice Node Manager
                    power limit change
           Product: Power Management
           Version: 2.5
    Kernel Version: 3.0.13
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: cpufreq
        AssignedTo: cpufreq@vger.kernel.org
        ReportedBy: przemyslaw.witka@intel.com
        Regression: No


When ondemand governor is active, CPU is not run at high cpu frequency.

Steps to reproduce:

1. Activate ondemand governor
2. Run 100% on CPU (check that CPU runs at the highest frequency)
3. Set Node Manager power limit (policy in CPU domain) to some quite low value
(cpu should run at low freq)
4. Remove Node Manager power limit

Expected result:
CPU should run again at the highest frequency

Actual result:
CPU runs at low frequency

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[Bug 54221] ondemand cpufeq governor do not notice Node Manager power limit change

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=54221


Przemyslaw Witka <przemyslaw.witka@intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |przemyslaw.witka@intel.com
           Platform|All                         |x86-64




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[Bug 54221] ondemand cpufeq governor do not notice Node Manager power limit change

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=54221


Aaron Lu <aaron.lu@intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |aaron.lu@intel.com




--- Comment #1 from Aaron Lu <aaron.lu@intel.com>  2013-02-28 01:39:06 ---
Hi Przemyslaw,

By node manager, do you mean this one https://01.org/nodemanager/about?

And does it ever work as expected on other kernel versions? If so, can you
please identify which kernel version starts to have problem and if you can do a
git bisect to find the offending commit, that would be great, thanks.

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[Bug 54221] ondemand cpufeq governor do not notice Node Manager power limit change

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https://bugzilla.kernel.org/show_bug.cgi?id=54221





--- Comment #2 from Przemyslaw Witka <przemyslaw.witka@intel.com>  2013-02-28 01:39:24 ---
I'm OOO from 23th of February. I'll be back at 4th of March.

Przemek

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[Bug 54221] ondemand cpufeq governor do not notice Node Manager power limit change

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https://bugzilla.kernel.org/show_bug.cgi?id=54221


Aaron Lu <aaron.lu@intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|cpufreq@vger.kernel.org     |aaron.lu@intel.com




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[Bug 54221] ondemand cpufeq governor do not notice Node Manager power limit change

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=54221


Aaron Lu <aaron.lu@intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|aaron.lu@intel.com          |cpufreq@vger.kernel.org




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[Bug 54221] ondemand cpufeq governor do not notice Node Manager power limit change

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=54221

Lan Tianyu <tianyu.lan@intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tianyu.lan@intel.com
           Assignee|cpufreq@vger.kernel.org     |tianyu.lan@intel.com

--- Comment #6 from Lan Tianyu <tianyu.lan@intel.com> ---
Hi,
    Please provide the output of "grep . /sys/bus/cpu/devices/cpu*/cpufreq/*"
after the issue takes place.

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