[    1.879245] ip (253) used greatest stack depth: 12608 bytes left
[    1.985558] ip (260) used greatest stack depth: 12576 bytes left
[    2.064118] ip (267) used greatest stack depth: 12528 bytes left
[    2.185405] ip (278) used greatest stack depth: 12320 bytes left
[    6.947022] ip (657) used greatest stack depth: 12144 bytes left
[   48.977492] netem: version 1.3