I compiled the ethernet interface with event countered enabled.
The following is from vmstat.
event total rate type
wm0 txdw 2008 0 intr
wm0 rxintr 29948 11 intr
wm0 linkintr 2 0 intr
wm0 txseg1 2426 0 misc
wm0 txseg2 43 0 misc
wm0 txseg3 12 0 misc
I haven't added any dynamic system event counters to the wan driver,
but I did add some interrupt counters that I check from ddb. The
actual processing (handling) of the wan interrupts is very low, but
the count that gets updated on entry into the interrupt handler is
exceedingly high after enabling one of the t1 ports. Once the port
is enabled, the only thing I can do is to break into the kernel
debugger since it seems like nothing else is happening other than pci
Int11's. BTW.. I did check the ethernet event counts from ddb and
they're reasonable.