From owner-freebsd-stable@FreeBSD.ORG Thu Feb 18 16:38:49 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id CDC9B1065670 for ; Thu, 18 Feb 2010 16:38:49 +0000 (UTC) (envelope-from h.schmalzbauer@omnilan.de) Received: from host.omnilan.net (host.omnilan.net [62.245.232.135]) by mx1.freebsd.org (Postfix) with ESMTP id 355638FC08 for ; Thu, 18 Feb 2010 16:38:48 +0000 (UTC) Received: from titan.flintsbach.schmalzbauer.de (titan.flintsbach.schmalzbauer.de [172.21.1.150]) (authenticated bits=0) by host.omnilan.net (8.13.8/8.13.8) with ESMTP id o1IGclKW039922 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 18 Feb 2010 17:38:48 +0100 (CET) (envelope-from h.schmalzbauer@omnilan.de) Message-ID: <4B7D6D17.5080109@omnilan.de> Date: Thu, 18 Feb 2010 17:38:47 +0100 From: Harald Schmalzbauer Organization: OmniLAN User-Agent: Thunderbird 2.0.0.23 (X11/20090906) MIME-Version: 1.0 To: Adam Vande More References: <4B7C1365.9070806@omnilan.de> <70CD649D-7659-4CE2-A16C-49B8C891CB5B@mac.com> <4B7C4066.5040006@omnilan.de> <4B7D3938.1000309@omnilan.de> <4B7D5AC4.9020509@mahan.org> <4B7D61DE.2020906@omnilan.de> <4B7D6635.20605@sasktel.net> <4B7D69A5.4010506@omnilan.de> <6201873e1002180828y406dca32k30ef64c05d1f7640@mail.gmail.com> In-Reply-To: <6201873e1002180828y406dca32k30ef64c05d1f7640@mail.gmail.com> X-Enigmail-Version: 0.95.6 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig18566BD8309451D042D5E535" Cc: Patrick Mahan , freebsd-stable@freebsd.org, Stephen Hurd Subject: Re: RELENG_8 ignoring TCP window size? [Was: Re: Help for TCP understanding wanted, ACK-MSS-Window [Was: Re: best practice to watch TCP parms of established sockets]] X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Feb 2010 16:38:49 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig18566BD8309451D042D5E535 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable Adam Vande More schrieb am 18.02.2010 17:28 (localtime): > On Thu, Feb 18, 2010 at 10:24 AM, Harald Schmalzbauer=20 > > wrote: >=20 > The problem is not with the windows box, these transfer rates are > sensible. The problem is with two RELENG_8 machines. >=20 > I'm doing this whole thing because I observed slowdowns under 20MB/= s > and I try to reproduce and investigate this. But first I have to ge= t > the idea right... If I don't understamd things going on when > transfers make sense, I won't be able to determine what happens whe= n > transfers are slowed down... >=20 >=20 > Have you considered the possibility it's not a tcp issue at all, maybe = a=20 > nic driver? I did, but then the transfers to the windows box were also affected I gue= ss. And to answer the iperf wondering of Patrick: ------------------------------------------------------------ Client connecting to banana, TCP port 2121 TCP window size: 4.00 MByte (default) ------------------------------------------------------------ [ 3] local 192.168.147.249 port 65230 connected with 192.168.147.11=20 port 2121 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1.07 GBytes 918 Mbits/sec Though I have no idea what this tells me. Never used iperf before... Thanks, -Harry --------------enig18566BD8309451D042D5E535 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.13 (FreeBSD) iEYEARECAAYFAkt9bRcACgkQLDqVQ9VXb8gZxwCfdtMmof4G3tA+tYILQqCHk2OZ Xg8Ani0pzk5zU7D6Fee8Ineg/lXdRo5r =+BjT -----END PGP SIGNATURE----- --------------enig18566BD8309451D042D5E535--