Messages in this thread | | | Date | Tue, 29 Nov 2011 13:51:50 +0000 (GMT) | From | "Artem S. Tashkinov" <> | Subject | Re: Re: Re: Re: [REGRESSION] [Linux 3.2] top/htop and all other CPU usage |
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On Nov 29, 2011, Michal Hocko wrote:
> It seems that this is cannot be set in runtime: > SYSDEV_CLASS_ATTR(current_driver, 0444, show_current_driver, NULL); > > Or maybe you need to boot with cpuidle_sysfs_switch. According to the > documentation you might be able to change the governor. I have no idea > whether this can help somehow but let's try that. > > I haven't found any intel_idle machine in my lab so far and all other > acpi_idle machines seem to work (or at least randomly selected ones) so > this smells like a major difference in the setup.
# echo acpi_idle > /sys/devices/system/cpu/cpuidle/current_driver bash: /sys/devices/system/cpu/cpuidle/current_driver: Permission denied
BTW
# cat /sys/devices/system/cpu/cpuidle/available_governors ladder menu
dmesg | grep -i idle [ 0.000000] Kernel command line: root=/dev/sda1 ro cpuidle_sysfs_switch [ 0.000126] using mwait in idle threads. [ 1.083872] intel_idle: MWAIT substates: 0x1120 [ 1.083873] intel_idle: v0.4 model 0x2A [ 1.083874] intel_idle: lapic_timer_reliable_states 0xffffffff [ 1.159043] cpuidle: using governor ladder [ 1.168842] cpuidle: using governor menu
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