cpupower

cpupower is a command line tool that allows users to manage the CPU frequency and power settings on Linux systems. It provides a way to control the scaling governor and other power-related parameters of the CPU.

1. cpupower is part of the Linux kernel's CPUFreq subsystem, which dynamically adjusts the CPU frequency based on system load.
2. With cpupower, users can change the CPU frequency scaling governor, which determines how the CPU frequency is adjusted.
3. The available CPU frequency scaling governors include ondemand, performance, powersave, and userspace.
4. The ondemand governor adjusts the CPU frequency based on usage, while the performance governor keeps the frequency at the maximum level.
5. Conversely, the powersave governor lowers the frequency to save power, and the userspace governor enables external tools to control the frequency scaling.
6. cpupower can also display information about the CPU frequency scaling and current system settings.
7. Users can set the minimum and maximum frequency limits for the CPU using cpupower.
8. The tool can show information about available CPUFreq drivers and supported hardware features.
9. It can also be used to set the CPU performance profile to balance power consumption and performance requirements.
10. cpupower is a powerful utility for managing CPU power and frequency settings, providing flexibility and control over system performance and energy usage.