Recursive nice?

lardon · 2008-09-22 16:56:56

Hi all,

I was wondering if there was any way to recursively set nice priorities on a process. By default, when you "nice" a process, it doesn't change the priorities of its children. So is there way to do so without heavy scripting? Or would any of you have such a script at their disposition?

B-Con · 2008-09-23 04:51:09

$ ps --ppid YOUR_PID | grep -v "PID" | awk '{print $1}' | xargs nice -YOUR_NICE_VALUE YOUR_PID

I think that will do it. Just list all of the process's children, then parse the pid's out and send them into nice.

[edit]
Added the YOUR_PID on the end so that this would effect the parent process as well.

Last edited by B-Con (2008-09-23 04:53:10)

lardon · 2008-09-23 07:20:48

B-Con wrote:

$ ps --ppid YOUR_PID | grep -v "PID" | awk '{print $1}' | xargs nice -YOUR_NICE_VALUE YOUR_PID

That doesn't work because it stops at the direct children of the process you pass in, so it's not recursive.

Profjim · 2008-09-23 12:01:56

OK, then, do:

function rnice {
nice -n $1 $2
for child in $(ps --ppid $2 -o pid=); do
rnice $1 $child
done
}

lardon · 2008-09-23 14:05:41

Very nice, thanks!

Arch Linux

#1 2008-09-22 16:56:56

Recursive nice?

#2 2008-09-23 04:51:09

Re: Recursive nice?

#3 2008-09-23 07:20:48

Re: Recursive nice?

#4 2008-09-23 12:01:56

Re: Recursive nice?

#5 2008-09-23 14:05:41

Re: Recursive nice?

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