[    1.878484] ip (254) used greatest stack depth: 12392 bytes left
[    2.307072] ip (285) used greatest stack depth: 12344 bytes left
[   12.454219] ip (966) used greatest stack depth: 12192 bytes left
[   57.701393] netem: version 1.3
[  616.072636] tc (12958) used greatest stack depth: 11936 bytes left