Частота процессора медленнее после каждого возобновления сна
Я запускаю kubuntu 15.10 на Lenovo Y50-70, и у меня очень неприятная проблема с процессорными часами: всякий раз, когда компьютер возобновляет спящий режим, часы процессора имеют более низкий максимум, и это происходит не один раз , но после каждого возобновления часы работают медленнее, пока он не снизится с первоначально 3,6 ГГц до ~ 600 МГц.
alain@alain-Y50-70:~$ sudo -i
[sudo] password for alain:
root@alain-Y50-70:~# cpupower frequency-info
analyzing CPU 0:
driver: intel_pstate
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 0.97 ms.
hardware limits: 800 MHz - 3.60 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 800 MHz and 3.60 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency is 817 MHz (asserted by call to hardware).
boost state support:
Supported: yes
Active: yes
root@alain-Y50-70:~# cat /sys/devices/system/cpu/intel_pstate/max_perf_pct
100
root@alain-Y50-70:~# cpupower frequency-info
analyzing CPU 0:
driver: intel_pstate
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 0.97 ms.
hardware limits: 800 MHz - 3.60 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 800 MHz and 2.88 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency is 800 MHz (asserted by call to hardware).
boost state support:
Supported: yes
Active: yes
root@alain-Y50-70:~# cat /sys/devices/system/cpu/intel_pstate/max_perf_pct
80
root@alain-Y50-70:~# cat /sys/devices/system/cpu/intel_pstate/max_perf_pct
60
root@alain-Y50-70:~# cat /sys/devices/system/cpu/intel_pstate/max_perf_pct
40
root@alain-Y50-70:~# cat /sys/devices/system/cpu/intel_pstate/max_perf_pct
40
root@alain-Y50-70:~# cpupower frequency-info
analyzing CPU 0:
driver: intel_pstate
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 0.97 ms.
hardware limits: 800 MHz - 3.60 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 800 MHz and 1.44 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency is 699 MHz (asserted by call to hardware).
boost state support:
Supported: yes
Active: yes
root@alain-Y50-70:~# cat /sys/devices/system/cpu/intel_pstate/max_perf_pct
40
root@alain-Y50-70:~# cpupower frequency-info
analyzing CPU 0:
driver: intel_pstate
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 0.97 ms.
hardware limits: 800 MHz - 3.60 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 800 MHz and 1.44 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency is 605 MHz (asserted by call to hardware).
boost state support:
Supported: yes
Active: yes
root@alain-Y50-70:~#
Я запустил компьютер между приведенными выше командами. Как вы можете видеть, сначала max_perf_pct уменьшается пошагово, пока не достигает 40, тогда он остается 40, но тактовая частота продолжает уменьшаться. Не важно, подключен ли ноутбук или нет, и нормальная температура.
Я думаю, это может быть связано с этой ошибкой: https://bugzilla.kernel.org/show_bug.cgi ? id = 90421
Самая большая проблема заключается в том, что я не могу найти способ вручную установить максимальные часы до 3,6 ГГц. Сначала я попробовал cpupower frequency-set -u 3.60GHz:
root@alain-Y50-70:~# cpupower frequency-set -u 3.60GHz
Setting cpu: 0
Setting cpu: 1
Setting cpu: 2
Setting cpu: 3
Setting cpu: 4
Setting cpu: 5
Setting cpu: 6
Setting cpu: 7
root@alain-Y50-70:~# cpupower frequency-info
analyzing CPU 0:
driver: intel_pstate
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 0.97 ms.
hardware limits: 800 MHz - 3.60 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 800 MHz and 1.44 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency is 699 MHz (asserted by call to hardware).
boost state support:
Supported: yes
Active: yes
root@alain-Y50-70:~# cat /sys/devices/system/cpu/intel_pstate/max_perf_pct
40
, но это кажется неправильным, потому что https://bugzilla.kernel.org/show_bug.cgi?id=90421 [!d3 ], поэтому я попробовал echo 100 >/sys/devices/system/cpu/intel_pstate/max_perf_pct без эффекта:
root@alain-Y50-70:~# echo 100 >/sys/devices/system/cpu/intel_pstate/max_perf_pct
root@alain-Y50-70:~# cpupower frequency-info
analyzing CPU 0:
driver: intel_pstate
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 0.97 ms.
hardware limits: 800 MHz - 3.60 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 800 MHz and 1.44 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency is 700 MHz (asserted by call to hardware).
boost state support:
Supported: yes
Active: yes
root@alain-Y50-70:~# cat /sys/devices/system/cpu/intel_pstate/max_perf_pct
40
Я также пробовал регулятор performance, без успеха.
Как установить максимальный тактовая частота до 3,6 ГГц?