--- baseline ---
--- leak run A (300 downstream connect/disconnect cycles) ---
done: 300 rounds (downstream/leak)
           netgraph     302   42.5K       0    390M      602
--- control run (300 inet-hook cycles, no callout involved) ---
done: 300 rounds (inet/control)
           netgraph     302   42.5K       0    390M      902
--- leak run B (300 more downstream cycles: monotonicity) ---
done: 300 rounds (downstream/leak)
           netgraph     602   84.7K       0    390M    1.47K
--- module pinning check (leaked node refs pin ng_cisco) ---
kldunload: can't unload file: Device busy
 6    0 0xffffffff8260b000     2000 ng_cisco.ko