Renice: How to change all threads?

Question

When I renice a multithreaded process in Ubuntu 10.04, then view the results in top, it seems that only the main thread actually gets reniced. All the other threads retain their old nice value. What's the easiest way to renice all threads in a process instead of just the main thread?

score 9 · Accepted Answer · edited Jun 20 '17 at 15:09

9

renice +/-n -g gid

Where gid is the process group id which you can find with ps -Aj

edited Jun 20 '17 at 15:09

7ochem

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answered May 08 '11 at 16:09

Red Tux

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score 2 · Answer 2 · answered Feb 19 '15 at 15:14

2

Inspired by zhihui's answer, what I actually used:

renice -n <niceness> -p `ps --no-heading -Lo tid <PID>`

answered Feb 19 '15 at 15:14

lvella

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score 1 · Answer 3 · edited Apr 20 '13 at 06:31

1

The following command can set the nice value to +15 for all threads in process "procid":

ps --no-heading -Lj <procid> | awk '{system("renice +15 "$4)}'

edited Apr 20 '13 at 06:31

slm

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answered Apr 20 '13 at 05:50

zhihui

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Renice: How to change all threads?

3 Answers3