Editing Underclocking (section)

===Linux===
The [[Linux (kernel)|Linux kernel]] supports CPU frequency modulation. In supported processors, using ''cpufreq'' to gain access to this feature gives the system administrator a variable level of control over the CPU's [[clock rate]]. The kernel includes six governors by default: Conservative, Ondemand, Performance, Powersave, Userspace and Schedutil.<ref>{{Cite web |last=Brodowski |first=Dominik |date=2017-04-12 |title=CPUFreq Governors |url=https://www.kernel.org/doc/Documentation/cpu-freq/governors.txt |website=kernel.org}}</ref> The Conservative and Ondemand governors adjust the [[clock rate]] depending on the CPU load, but each with different algorithms. The Ondemand governor jumps to maximum frequency on CPU load and decreases the frequency step by step on CPU idle, whereas the Conservative governor increases the frequency step by step on CPU load and jumps to lowest frequency on CPU idle. The Performance, Powersave and Userspace governors set the [[clock rate]] statically: Performance to the highest available, Powersave to the lowest available, and Userspace to a frequency determined and controlled by the user. The Schedutil governor estimates the load through the [[Scheduling (computing)|scheduler]]'s Per-Entity Load Tracking (PELT) mechanism.