New: ondemand cpufeq governor do not notice Node Manager power limit change
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: [email protected]
ReportedBy: [email protected]
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
https://bugzilla.kernel.org/show_bug.cgi?id=54221
Przemyslaw Witka <[email protected]> changed:
What |Removed |Added
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CC| |[email protected] Platform|All |x86-64
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[Bug 54221] ondemand cpufeq governor do not notice Node Manager power limit change
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=54221
Aaron Lu <[email protected]> changed:
What |Removed |Added
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CC| |[email protected]
--- Comment #1 from Aaron Lu <[email protected]> 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
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=54221
--- Comment #2 from Przemyslaw Witka <[email protected]> 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
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=54221
Aaron Lu <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|[email protected] |[email protected]
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[Bug 54221] ondemand cpufeq governor do not notice Node Manager power limit change
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=54221
Aaron Lu <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|[email protected] |[email protected]
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[Bug 54221] ondemand cpufeq governor do not notice Node Manager power limit change
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=54221
Lan Tianyu <[email protected]> changed:
What |Removed |Added
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CC| |[email protected] Assignee|[email protected] |[email protected]
--- Comment #6 from Lan Tianyu <[email protected]> ---
Hi,
Please provide the output of "grep . /sys/bus/cpu/devices/cpu*/cpufreq/*"
after the issue takes place.
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