[    2.129260] ip (263) used greatest stack depth: 12616 bytes left
[    2.240057] ip (272) used greatest stack depth: 12368 bytes left
[    4.877603] ip (473) used greatest stack depth: 12352 bytes left
[    9.044232] ip (751) used greatest stack depth: 12072 bytes left
[   53.052080] netem: version 1.3