From owner-freebsd-net@FreeBSD.ORG  Thu Aug 20 16:53:59 2009
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 89DF7106564A
	for <freebsd-net@freebsd.org>; Thu, 20 Aug 2009 16:53:59 +0000 (UTC)
	(envelope-from manishv@lineratesystems.com)
Received: from mail-vw0-f180.google.com (mail-vw0-f180.google.com
	[209.85.212.180])
	by mx1.freebsd.org (Postfix) with ESMTP id 4D3808FC62
	for <freebsd-net@freebsd.org>; Thu, 20 Aug 2009 16:53:58 +0000 (UTC)
Received: by vws10 with SMTP id 10so40149vws.7
	for <freebsd-net@freebsd.org>; Thu, 20 Aug 2009 09:53:58 -0700 (PDT)
MIME-Version: 1.0
Received: by 10.220.16.146 with SMTP id o18mr3171vca.70.1250787238201; Thu, 20 
	Aug 2009 09:53:58 -0700 (PDT)
In-Reply-To: <435336.24858.qm@web63908.mail.re1.yahoo.com>
References: <5bc218350908191146j2a22f8dcrdecb0b67eedce5c2@mail.gmail.com>
	<435336.24858.qm@web63908.mail.re1.yahoo.com>
Date: Thu, 20 Aug 2009 10:53:58 -0600
Message-ID: <5bc218350908200953p630d99c6u1538999b308c55f9@mail.gmail.com>
From: Manish Vachharajani <manishv@lineratesystems.com>
To: Barney Cordoba <barney_cordoba@yahoo.com>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Cc: freebsd-net@freebsd.org
Subject: Re: Dropped vs. missed packets in the ixgbe driver
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 20 Aug 2009 16:53:59 -0000

Oh whoops, sorry didn't see that.  So the plot thickens.  Why don't
these errors show up in the netstat output I forwarded originally?
Ierrs was 0 but the dmesg output clearly shows missed packets.  Any
thoughts on what is going on?  Looking at the code, missed_rx should
certainly get counted in the ierrors field as you said.

Is the Ierrs in the netstat output some other counter?  If so, how do
I get the if_ierrors variable from the command line?

Manish

On Thu, Aug 20, 2009 at 6:49 AM, Barney Cordoba<barney_cordoba@yahoo.com> w=
rote:
>
>
> --- On Wed, 8/19/09, Manish Vachharajani <manishv@lineratesystems.com> wr=
ote:
>
>> From: Manish Vachharajani <manishv@lineratesystems.com>
>> Subject: Re: Dropped vs. missed packets in the ixgbe driver
>> To: "Barney Cordoba" <barney_cordoba@yahoo.com>
>> Cc: freebsd-net@freebsd.org
>> Date: Wednesday, August 19, 2009, 2:46 PM
>> Agreed, the errors are reported but
>> missed packets are not.=A0 The
>> question is, is the correct fix to just add stats.mpc[0] to
>> if_ierrors
>> in that line or to add it to if_iqdrops.=A0 The fix is
>> easy once we
>> agree on what the correct behavior is.
>>
>> Manish
>>
>> > Barney wrote:
>> >
>> > if you look in ixgbe_update_stats_counters at the
>> bottom:
>> >
>> > =A0 =A0 =A0 =A0ifp->if_ierrors =3D missed_rx +
>> adapter->stats.crcerrs +
>> > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0adapter->stats.rlec;
>> >
>> > the errors are added in.
>> >
>> > BC
>
> Huh? missed_rx are the missed packets. So they are counted.
>
> BC
>
>
>
>
>



--=20
Manish Vachharajani
Founder
LineRate Systems
manishv@lineratesystems.com
(609)635-9531 M