Cpulimit is a tool that limits the CPU usage of a process (expressed in percentage, not in CPU time). It is useful to control batch jobs when you don’t want them to eat too many CPU cycles. The goal of cpulimit is to prevent a process from running for more than a specified time ratio. It does not change the nice value or other scheduling priority settings but the real CPU usage.
Source: How to limit CPU usage with CPULimit on Ubuntu Linux
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