[    1.687910] ip (250) used greatest stack depth: 12384 bytes left
[    2.059841] ip (280) used greatest stack depth: 12352 bytes left
[    2.153969] ip (289) used greatest stack depth: 12336 bytes left
[    5.388795] ip (566) used greatest stack depth: 12152 bytes left
[   51.708668] netem: version 1.3