[    2.276742] ip (276) used greatest stack depth: 12192 bytes left
[   54.100338] netem: version 1.3
[   84.645254] ip (2634) used greatest stack depth: 12064 bytes left
[  114.177138] ip (2895) used greatest stack depth: 12032 bytes left
[  592.167636] tc (12617) used greatest stack depth: 11936 bytes left