[    1.471626] ip (259) used greatest stack depth: 12168 bytes left
[    1.730214] ip (296) used greatest stack depth: 11960 bytes left
[    9.475003] ip (1502) used greatest stack depth: 11944 bytes left
[   73.562847] netem: version 1.3
[  628.798609] tc (24871) used greatest stack depth: 11880 bytes left