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Manage Intel Turbo Boost with systemd

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[系统(linux) 所属分类 系统(linux) | 发布者 店小二04 | 时间 2017 | 作者 红领巾 ] 0人收藏点击收藏

If you have a little laptop with an Intel CPU that supports turbo boost, you might find that it’s getting a little hot when you’re using it on your lap.

For example, taking a look at my CPU:

lscpu |egrep "Model name|MHz"

We can see that it’s a 2.7GHz CPU with turbo boost taking it up to 3.5GHz.

Model name: Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz

CPU MHz: 524.633

CPU max MHz: 3500.0000

CPU min MHz: 400.0000

Here’s a way that you can enable and disable turbo boost with a systemd service, which lets you hook it into other services or disable it on boot.

By default, turbo boost is on, so starting our service will disable it.

Create the service.

cat \ /sys/devices/system/cpu/intel_pstate/no_turbo" ExecStop=/bin/sh -c "/usr/bin/echo 0 > \ /sys/devices/system/cpu/intel_pstate/no_turbo" RemainAfterExit=yes EOF

Reload systemd manager configuration.

sudo systemctl daemon-reload

Test it by running something CPU intensive and watching the current running MHz.

cat /dev/urandom > /dev/null & lscpu |grep "CPU MHz"

CPU MHz: 3499.859

Now disable turbo boost and check the CPU speed again.

sudo systemctl start disable-turbo-boost lscpu |grep "CPU MHz"

CPU MHz: 2699.987

Don’t forget to kill the CPU intensive process

kill %1

If you want to disable turbo boost on boot by default, just enable the service.

sudo systemctl enable disable-turbo-boost

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