Limit the cpu usage of a process

prlimit --cpu=10 sort -u hugefile
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

4
By: mhs
2013-02-27 15:59:11

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yeiuoisdf · 289 weeks and 2 days 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?
Flow · 288 weeks 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.
mhs · 288 weeks ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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