[    1.393703] ip (216) used greatest stack depth: 12152 bytes left
[    3.477481] ip (719) used greatest stack depth: 11944 bytes left
[   37.183571] ip (3092) used greatest stack depth: 11896 bytes left
[   51.792795] netem: version 1.3
[  530.641637] tc (20911) used greatest stack depth: 11704 bytes left