[    2.277082] ip (251) used greatest stack depth: 12912 bytes left
[    2.490140] ip (263) used greatest stack depth: 12608 bytes left
[    2.604643] ip (272) used greatest stack depth: 12368 bytes left
[    2.708529] ip (281) used greatest stack depth: 12352 bytes left
[   37.829621] ip (1469) used greatest stack depth: 12072 bytes left
[   51.976583] netem: version 1.3