[    1.693379] ip (250) used greatest stack depth: 12368 bytes left
[    2.021807] ip (280) used greatest stack depth: 12320 bytes left
[    8.136016] ip (830) used greatest stack depth: 12128 bytes left
[   39.587719] ip (1890) used greatest stack depth: 12016 bytes left
[   47.029783] netem: version 1.3
[  550.563581] tc (11912) used greatest stack depth: 11872 bytes left