[    1.943787] ip (251) used greatest stack depth: 12400 bytes left
[    2.346210] ip (282) used greatest stack depth: 12368 bytes left
[    3.630075] ip (379) used greatest stack depth: 12352 bytes left
[   56.038024] netem: version 1.3
[  613.315147] tc (12612) used greatest stack depth: 11936 bytes left