cpufreq - CPU Monitor and Power Manager

CPUFreq is a lightweight CPU scaling monitor and powerful CPU management tool. The extension is using Linux kernel to collect information and manage power governors, frequencies etc. It needs root permission to able changing governors.

It has two power management models on Linux OS. First, the standard acpi-cpufreq kernel module provides many static and dynamic CPU governors like ondemand (default), powersave, performance, userspace, conservative, schedutil, interactive, custom profiles with a lot of options and separate core profiles configurations. Second, intel-pstate presents only two dynamic embedded power profiles: powersave (default) and performance.