[    1.965034] ip (254) used greatest stack depth: 12392 bytes left
[    2.306023] ip (276) used greatest stack depth: 12360 bytes left
[    3.745436] ip (382) used greatest stack depth: 12344 bytes left
[   54.025246] netem: version 1.3
[  438.253664] ip (7947) used greatest stack depth: 12064 bytes left