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From: Tim Kientzle <kientzle@freebsd.org>
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Date: Sat, 4 Aug 2012 12:21:23 -0700
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Subject: How to Expose Chip-level Ethernet Statistics?
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I believe that some of the issues I'm having with this
Ethernet driver might be easier to diagnose if I could
expose the chip-level statistics counters (especially queue
overrun counts).

Is there a standard way to do this?

I've looked at systat, netstat, and ifconfig but haven't
yet found a standard tool that queries this sort of
information.  (If I could find that, I could figure out
which ioctl it used=85)

Pointers appreciated=85  In particular, if there's another
Ethernet driver that does this well, I can use that for a
reference.

Tim