From owner-freebsd-net  Sat Jun  8 22:31:32 2002
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Date: Sat, 08 Jun 2002 22:30:28 -0700
From: Terry Lambert <tlambert2@mindspring.com>
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To: Andy Sparrow <spadger@best.com>
Cc: Larry Rosenman <ler@lerctr.org>, freebsd-net@FreeBSD.ORG,
	freebsd-hackers@FreeBSD.ORG
Subject: Re: MIB support for network devices in FreeBSD?
References: <20020609035146.55A8F3E2D@CRWdog.demon.co.uk>
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Andy Sparrow wrote:
> But these stats don't seem to be collected for at least some network card
> drivers, presumably because those drivers aren't collecting those stats, e.g.
> they don't #include <net/if_mib.h>, and thus don't allocate a mib structure or
> increment any counters in that structure.
> 
> I can confirm that it definately doesn't work for the 'wi' and 'lo' drivers...
> 
> However, it definately seems to work for the xl driver...

Benchmark the driver.

If it's fast, it doesn't collect the statistics.

Just like "WITNESS": if your machine is fast, "WITNESS" is disabled.

8-).

Bascially, most of these statistics are "manager fluff" (as opposed
to "seat cushion fluuf" or "pocket fluff").

What you want is statistics that are managed universally; see
"netstat -ibdt" for the usefult statistics kept per interface.

-- Terry

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