[gentoo-user] Per-process CPU % usage limit

[Etaoin Shrdlu]

As the subject says, is there any way to force a particular process to 
use at most a given CPU percentage?

Ulimit does not help, since I don't want a CPU time limit and I don't 
want the process to be killed.

The problem is that some very CPU-consuming apps, even if started with 
the lowest priority (eg, nice -n 19), still eat up 100% CPU (with 
subsequent overheating, fan start, throttling, etc.) if the system is 
not busy and has nothing else to do. What I'd like to know is whether it 
is possible to impose such a CPU percentage usage limit.

Thanks for any help.
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