[    2.557719] ip (286) used greatest stack depth: 12360 bytes left
[    5.518953] ip (483) used greatest stack depth: 12344 bytes left
[   55.909285] netem: version 1.3
[  421.811428] ip (7383) used greatest stack depth: 12192 bytes left
[  612.788849] tc (12612) used greatest stack depth: 11936 bytes left