[    1.840069] ip (248) used greatest stack depth: 12368 bytes left
[    1.905086] ip (253) used greatest stack depth: 12320 bytes left
[    8.414332] ip (830) used greatest stack depth: 12160 bytes left
[   15.389674] ip (1016) used greatest stack depth: 12032 bytes left
[   47.563744] netem: version 1.3