[    1.779794] ip (248) used greatest stack depth: 12368 bytes left
[    2.129716] ip (278) used greatest stack depth: 12320 bytes left
[    4.548229] ip (471) used greatest stack depth: 12160 bytes left
[   41.744090] ip (1984) used greatest stack depth: 12032 bytes left
[   48.401457] netem: version 1.3