Привет, ЛОР!
Кто нибудь уже разобрался с новым драйвером управления питанием для AMD под названием amd-pstate?
У меня получилось его загрузить, но я не имею ни малейшего понятия, как им управлять.
Как ограничить частоту или мощность процессора, как выключить амудешный «turbo boost» при работе от батареи, да и вообще как хоть что-то поменять?
Гугл не помогает от слова совсем.
ann@shadowmoon:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver
amd-pstate
ann@shadowmoon:~$ ls /sys/devices/system/cpu/cpu0/cpufreq
affected_cpus amd_pstate_lowest_nonlinear_freq cpuinfo_max_freq cpuinfo_transition_latency scaling_available_governors scaling_driver scaling_max_freq scaling_setspeed
amd_pstate_highest_perf amd_pstate_max_freq cpuinfo_min_freq related_cpus scaling_cur_freq
scaling_governor scaling_min_freq
ann@shadowmoon:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/amd_pstate_highest_perf
166
ann@shadowmoon:~$ echo 83 | sudo tee /sys/devices/system/cpu/cpu0/cpufreq/amd_pstate_highest_perf
tee: /sys/devices/system/cpu/cpu0/cpufreq/amd_pstate_highest_perf: Permission denied
83
ann@shadowmoon:~$ sudo cpupower frequency-info
analyzing CPU 0:
driver: amd-pstate
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 131 us
hardware limits: 400 MHz - 1.90 GHz
available cpufreq governors: performance schedutil
current policy: frequency should be within 400 MHz and 400 MHz.
The governor "schedutil" may decide which speed to use
within this range.
current CPU frequency: Unable to call hardware
current CPU frequency: 2.74 GHz (asserted by call to kernel)
boost state support:
Supported: yes
Active: no
AMD PSTATE Highest Performance: 166. Maximum Frequency: 4.51 GHz.
AMD PSTATE Nominal Performance: 70. Nominal Frequency: 1.90 GHz.
AMD PSTATE Lowest Non-linear Performance: 41. Lowest Non-linear Frequency: 1.11 GHz.
AMD PSTATE Lowest Performance: 15. Lowest Frequency: 400 MHz.
ann@shadowmoon:~$ sudo cpupower frequency-set -d 1.11GHz -u 1.11GHz
Setting cpu: 0
Setting cpu: 1
Setting cpu: 2
Setting cpu: 3
Setting cpu: 4
Setting cpu: 5
Setting cpu: 6
Setting cpu: 7
Setting cpu: 8
Setting cpu: 9
Setting cpu: 10
Setting cpu: 11
Setting cpu: 12
Setting cpu: 13
Setting cpu: 14
Setting cpu: 15
ann@shadowmoon:~$ sudo cpupower frequency-info
analyzing CPU 0:
driver: amd-pstate
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 131 us
hardware limits: 400 MHz - 1.90 GHz
available cpufreq governors: performance schedutil
current policy: frequency should be within 1.11 GHz and 1.11 GHz.
The governor "schedutil" may decide which speed to use
within this range.
current CPU frequency: Unable to call hardware
current CPU frequency: 2.97 GHz (asserted by call to kernel)
boost state support:
Supported: yes
Active: no
AMD PSTATE Highest Performance: 166. Maximum Frequency: 4.51 GHz.
AMD PSTATE Nominal Performance: 70. Nominal Frequency: 1.90 GHz.
AMD PSTATE Lowest Non-linear Performance: 41. Lowest Non-linear Frequency: 1.11 GHz.
AMD PSTATE Lowest Performance: 15. Lowest Frequency: 400 MHz.
ann@shadowmoon:~$ grep MHz /proc/cpuinfo
cpu MHz : 400.000
cpu MHz : 400.000
cpu MHz : 3544.897
cpu MHz : 3136.247
cpu MHz : 3801.438
cpu MHz : 400.000
cpu MHz : 4078.575
cpu MHz : 400.000
cpu MHz : 4143.479
cpu MHz : 3781.898
cpu MHz : 400.000
cpu MHz : 3346.888
cpu MHz : 400.000
cpu MHz : 400.000
cpu MHz : 400.000
cpu MHz : 3934.364
ну, то есть, как видим — ему пофигу от слова совсем.
куда копать?
или это всё пока слишком новые шайтан технологии и нужно подождать пару релизов ядра, как обычно?
