[    1.902823] ip (251) used greatest stack depth: 12400 bytes left
[    2.314603] ip (281) used greatest stack depth: 12368 bytes left
[    4.736902] ip (474) used greatest stack depth: 12352 bytes left
[    8.376302] ip (745) used greatest stack depth: 12072 bytes left
[   52.653320] netem: version 1.3
[  409.437536] ip (7265) used greatest stack depth: 12040 bytes left