一、首先修改启动项
root@pve:~# vi /etc/default/grub
找到quiet那个位置，后面加空格，再加intel_pstate=disable
加上参数后保存，并更新grub
root@pve:~# update-grub
保存完后重启生效。
二、安装cpufrequtils
root@pve:~# apt-get install cpufrequtils
三、配置
先查看一下信息
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: acpi-cpufreq
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 10.0 us.
hardware limits: 1.60 GHz - 2.30 GHz
available frequency steps: 2.30 GHz, 2.20 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.80 GHz, 1.70 GHz, 1.60 GHz
available cpufreq governors: conservative, ondemand, userspace, powersave, performance, schedutil
current policy: frequency should be within 1.60 GHz and 1.60 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 2.30 GHz (asserted by call to hardware).
cpufreq stats: 2.30 GHz:12.35%, 2.20 GHz:0.00%, 2.10 GHz:0.00%, 2.00 GHz:5.16%, 1.90 GHz:0.00%, 1.80 GHz:0.00%, 1.70 GHz:0.00%, 1.60 GHz:82.49% (4)
analyzing CPU 1:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 1
CPUs which need to have their frequency coordinated by software: 1
maximum transition latency: 10.0 us.
hardware limits: 1.60 GHz - 2.30 GHz
available frequency steps: 2.30 GHz, 2.20 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.80 GHz, 1.70 GHz, 1.60 GHz
available cpufreq governors: conservative, ondemand, userspace, powersave, performance, schedutil
current policy: frequency should be within 1.60 GHz and 1.60 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 2.30 GHz (asserted by call to hardware).
cpufreq stats: 2.30 GHz:12.35%, 2.20 GHz:0.00%, 2.10 GHz:0.00%, 2.00 GHz:2.45%, 1.90 GHz:0.00%, 1.80 GHz:0.00%, 1.70 GHz:0.00%, 1.60 GHz:85.21% (4)
可以看到目前是performance模式，主频是2.30 GHz ，下面就配置一下，改成省电模式（powersave) 以最低允许的主频运行
root@pve:~# vi /etc/init.d/cpufrequtils
找到如下：
ENABLE="true"
GOVERNOR="performance"
MAX_SPEED="2300000"
MIN_SPEED="1600000"
改成：
ENABLE="true"
GOVERNOR="powersave"
MAX_SPEED="1600000"
MIN_SPEED="1600000"
保存后，重启服务：
root@pve:~# systemctl daemon-reload
root@pve:~# /etc/init.d/cpufrequtils restart
如果不生效，查看一下是否有/etc/default/cpufrequtils文件，如果有，在这里修改就可以了。
四、查看
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: acpi-cpufreq
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 10.0 us.
hardware limits: 1.60 GHz - 2.30 GHz
available frequency steps: 2.30 GHz, 2.20 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.80 GHz, 1.70 GHz, 1.60 GHz
available cpufreq governors: conservative, ondemand, userspace, powersave, performance, schedutil
current policy: frequency should be within 1.60 GHz and 1.60 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency is 1.60 GHz (asserted by call to hardware).
cpufreq stats: 2.30 GHz:12.35%, 2.20 GHz:0.00%, 2.10 GHz:0.00%, 2.00 GHz:5.16%, 1.90 GHz:0.00%, 1.80 GHz:0.00%, 1.70 GHz:0.00%, 1.60 GHz:82.49% (4)
analyzing CPU 1:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 1
CPUs which need to have their frequency coordinated by software: 1
maximum transition latency: 10.0 us.
hardware limits: 1.60 GHz - 2.30 GHz
available frequency steps: 2.30 GHz, 2.20 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.80 GHz, 1.70 GHz, 1.60 GHz
available cpufreq governors: conservative, ondemand, userspace, powersave, performance, schedutil
current policy: frequency should be within 1.60 GHz and 1.60 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency is 1.60 GHz (asserted by call to hardware).
cpufreq stats: 2.30 GHz:12.35%, 2.20 GHz:0.00%, 2.10 GHz:0.00%, 2.00 GHz:2.45%, 1.90 GHz:0.00%, 1.80 GHz:0.00%, 1.70 GHz:0.00%, 1.60 GHz:85.21% (4)
看到已经修改生效了。
经过测试，省电模式下，待机会保持在最低功耗，温度也最低。
为了简化操作，我写了个pve工具：
https://github.com/ivanhao/pvetools.git
其中就包含上面的内容而且是自动化配置，很方便实用。
