[    1.627635] ip (249) used greatest stack depth: 12896 bytes left
[    1.772901] ip (261) used greatest stack depth: 12528 bytes left
[    1.925959] ip (279) used greatest stack depth: 12320 bytes left
[    4.901264] ip (542) used greatest stack depth: 12048 bytes left
[   47.105804] netem: version 1.3