Linux Cpufrequtils CPU頻率控制

使用cpufrequtils可降頻來降低溫度和省電 

 確認CPU驅動 

 cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_driver 

 如果顯示為  intel_pstate ，您可能需要禁用它並切換到  intel-cpufreq 驅動程序 

 編輯 /etc/default/grub ，在GRUB_CMDLINE_LINUX_DEFAULT加入intel_pstate=disable 

 GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_pstate=disable"

update-grub

reboot 

 再次確認狀態為 intel-cpufre 

 cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_driver 

 安裝Cpufrequtils 

 apt-get install cpufrequtils 

 查看支持cpu管理模式 

 cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors

conservative ondemand userspace powersave performance schedutil 

 查看CPU訊息 

 cpufreq-info 

 root@pve:~# cpufreq-info

cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009

Report errors and bugs to cpufreq@vger.kernel.org, please.

analyzing CPU 0:

 driver: intel_cpufreq

 CPUs which run at the same hardware frequency: 0

 CPUs which need to have their frequency coordinated by software: 0

 maximum transition latency: 20.0 us.

 hardware limits: 1.20 GHz - 3.50 GHz

 available cpufreq governors: conservative, ondemand, userspace, powersave, performance, schedutil

 current policy: frequency should be within 1.20 GHz and 3.50 GHz.

 The governor "ondemand" may decide which speed to use

 within this range.

 current CPU frequency is 3.05 GHz. 

 修改模式 

 編輯 /etc/init.d/cpufrequtils 

 ENABLE="true"

GOVERNOR="powersave" <<<修改模式 ondemand改powersave

MAX_SPEED="0"

MIN_SPEED="0" 

 systemctl daemon-reload

/etc/init.d/cpufrequtils restart 

 root@pve:~# cpufreq-info

cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009

Report errors and bugs to cpufreq@vger.kernel.org, please.

analyzing CPU 0:

 driver: intel_cpufreq

 CPUs which run at the same hardware frequency: 0

 CPUs which need to have their frequency coordinated by software: 0

 maximum transition latency: 20.0 us.

 hardware limits: 1.20 GHz - 3.50 GHz

 available cpufreq governors: conservative, ondemand, userspace, powersave, performance, schedutil

 current policy: frequency should be within 1.20 GHz and 3.50 GHz.

 The governor "powersave" may decide which speed to use

 within this range.

 current CPU frequency is 1.20 GHz.