From: "David S. Miller" <davem@redhat.com>
To: Ben Greear <greearb@candelatech.com>
Cc: netdev@oss.sgi.com
Subject: Re: How to count tx and rx bytes?
Date: Mon, 15 Dec 2003 14:17:29 -0800 [thread overview]
Message-ID: <20031215141729.15387fc1.davem@redhat.com> (raw)
In-Reply-To: <3FDE13AE.3050402@candelatech.com>
On Mon, 15 Dec 2003 12:03:58 -0800
Ben Greear <greearb@candelatech.com> wrote:
> Is there an agreed upon standard for exactly what ethernet drivers
> should be counting for rx-bytes and tx-bytes? For example, should the
> counters include the 4-byte FCS? Should they include the ethernet header?
Good question.
It should be that all drivers use what skb->len ends up with at
rx/tx time.
However, it is often faster to just let the hardware keep track
of these statistics (tg3 is one example of a chip that can do
this). And sometimes these mechanisms take the FCS or whatever
into account and this as you note makes the numbers different.
next prev parent reply other threads:[~2003-12-15 22:17 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-15 20:03 How to count tx and rx bytes? Ben Greear
2003-12-15 22:17 ` David S. Miller [this message]
2003-12-15 22:40 ` Randy.Dunlap
2003-12-15 23:19 ` Donald Becker
2003-12-15 23:22 ` Randy.Dunlap
2003-12-15 22:46 ` Ben Greear
2003-12-15 22:54 ` David S. Miller
2003-12-15 23:17 ` Ben Greear
2003-12-16 0:08 ` David S. Miller
2003-12-16 13:38 ` Rask Ingemann Lambertsen
2003-12-16 15:45 ` Randy.Dunlap
2003-12-16 19:38 ` Ben Greear
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