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ionice can take a process group ID as an argument (-P switch), which, obviously, affects all processes (and threads) in the given process group. Once can find the process group ID by looking at the 5th field of /proc/<PID>/stat (or using ps). This setting is a bit more coarse than what I really wanted, but works well enough.


You might consider 3 ways to reduce your proces impact on system load/CPU time: Use the nice command to manually lower the task's priority. Use the cpulimit command to repeatedly pause the process so that it doesn’t exceed a certain limit. Use Linux’s built-in control groups, a mechanism which tells the scheduler to limit the amount of resources available ...

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