tldr/pages/linux/cpulimit.md

cpulimit

A tool to throttle the CPU usage of other processes. More information: http://cpulimit.sourceforge.net/.

• Limit an existing process with PID 1234 to only use 25% of the CPU:

cpulimit --pid {{1234}} --limit {{25%}}

• Limit an existing program by its executable name:

cpulimit --exe {{program}} --limit {{25}}

• Launch a given program and limit it to only use 50% of the CPU:

cpulimit --limit {{50}} -- {{program argument1 argument2 ...}}

• Launch a program, limit its CPU usage to 50% and run cpulimit in the background:

cpulimit --limit {{50}} --background -- {{program}}

• Kill its process if the program's CPU usage goes over 50%:

cpulimit --limit 50 --kill -- {{program}}

• Throttle both it and its child processes so that none go about 25% CPU:

cpulimit --limit {{25}} --monitor-forks -- {{program}}