How to use cgroup in ubuntu 13.04

Question

I'm trying to learn how cgroup works on Ubuntu and seems that cgroup doesn't work in Ubuntu 13.04. I am using the answer to this question How to set cpu limit for given process permanently. Cpulimit and nice don't work

These are what I've done:

Installed cgroup:
```
sudo apt-get install cgroup-bin
```
reboot
Make a cgroup for your user (the owner of the process):
```
sudo cgcreate -a ipeacocks -g cpu:ipeacocks
```

Ran the command:

echo 100 > /sys/fs/cgroup/cpu/ipeacocks/cpu.shares

and output:

cgroup change of group failed

Why? What I am doing wrong?

score 24 · Accepted Answer · edited Nov 23 '20 at 10:50

24

You need to be the owner of the tasks file as well so you have permission to write a pid to it. To do that, Use -t, e.g.,

sudo cgcreate -a $USER:$USER -t $USER:$USER -g cpu:ipeacocks

edited Nov 23 '20 at 10:50

Masood Khaari

answered Nov 05 '13 at 16:22

William Stein

yes, that was it. A pity I cannot mark at solved. @ipeacocks, would you? – Rmano Nov 21 '14 at 18:09
1

just to help a bit sudo cgcreate -a $USER:$USER -t $USER:$USER -g ... – Aquarius Power Jul 08 '17 at 23:45
I had to run additionally this command to make the error go away: chmod 711 /sys/fs/cgroup/cpu,cpuacct – Roland Pihlakas Sep 30 '20 at 20:18
Didn't work on Ubuntu 22.04 which now has cgroups v2 unfortunately: https://askubuntu.com/questions/1406329/how-to-run-cgexec-without-sudo-as-current-user-on-ubuntu-22-04-with-cgroups-v2 – Ciro Santilli OurBigBook.com May 03 '22 at 11:37

1 Answers1