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Limit the cpu usage of a process

Terminal - Limit the cpu usage of a process
prlimit --cpu=10 sort -u hugefile
2013-02-27 15:59:11
User: mhs
Functions: sort
4
Limit the cpu usage of a process

Similar to `cpulimit`, although `prlimit` can be found shipped with recent util-linux.

Example: limit CPU consumption to 10% for a math problem which ordinarily takes up 100% CPU:

Before:

bc -l <(echo "1234123412341234^12341234")

See the difference `prlimit` makes:

prlimit --cpu=10 bc -l <(echo "1234123412341234^12341234")

To actually monitor the CPU usage, use `top`, `sar`, etc.. or:

pidstat -C 'bc' -hur -p ALL 1

Alternatives

There is 1 alternative - vote for the best!

Terminal - Alternatives
sudo cpulimit -p pid -l 50
2011-11-21 08:43:57
User: Dhinesh
Functions: sudo
Tags: cpu
20

This will limit the average amount of CPU it consumes.

sudo cpulimit -e Grooveshark -l 20
2010-11-15 16:58:50
User: poulter7
Functions: sudo
0

Will limit the amount of CPU time Grooveshark the greedy yet useful Adobe Air app will have.

Leaves the UI lagging a little, but crucially does not ruin the audio.

Know a better way?

If you can do better, submit your command here.

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Comment by yeiuoisdf 121 weeks ago

And what does it mean to limit the cpu time to 10 seconds: That the process can only run for maximal 10 CPU seconds? Or that the process will get re-scheduled after 10 seconds?

Comment by Flow 119 weeks and 5 days ago

Not seconds of time, but *CPU time* (as in "timesharing"). The CPU is a finite resource which has to be shared, and sometimes the greedy processes should be throttled; the other processes need their fair share of time on the CPU too.. So rather than allowing our greedy process to hog the CPU core for 100% of the time, we limit him to only 10% of the available time on that core.

Comment by mhs 119 weeks and 5 days ago

Your point of view

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