cpulimit is a simple program that attempts to limit the cpu usage of a process (expressed in percentage, not in cpu time). This is useful to control batch jobs, when you don’t want them to eat too much cpu. It does not act on the nice value or other scheduling priority stuff, but on the real cpu usage. Also, it is able to adapt itself to the overall system load, dynamically and quickly.
Install CPU limit on ubuntu :
sudo apt-get install cpulimit
How to use cpulimit?
Limit the process ‘bigloop’ by executable name to 20% CPU:
cpulimit --exe bigloop --limit 20
cpulimit --exe /usr/local/bin/bigloop --limit 20
Limit a process by PID to 45% CPU:
cpulimit --pid 2960 --limit 45
Use the command bellow to find more about cpulimit:
You can find a complete and more detailled about cpulimit use on this link