cpufrequtils is used to control the CPU frequency scaling deamon (speedstep, throttling, ...).
This package mainly has 2 programs:
/usr/bin/cpufreq-info
/usr/bin/cpufreq-set
It's basically a user-friendly alternative to using the Sys interface.
Frequency scaling allows you to set the CPU frequency on-the-fly or specify an automatic governor. By lowering the CPU frequency when your computer is idle, you can preserve a lot of battery power and keep the system cool.
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