Date: Thu, 18 Feb 2010 17:38:47 +0100 From: Harald Schmalzbauer <h.schmalzbauer@omnilan.de> To: Adam Vande More <amvandemore@gmail.com> Cc: Patrick Mahan <mahan@mahan.org>, freebsd-stable@freebsd.org, Stephen Hurd <shurd@sasktel.net> 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]] Message-ID: <4B7D6D17.5080109@omnilan.de> In-Reply-To: <6201873e1002180828y406dca32k30ef64c05d1f7640@mail.gmail.com> 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>
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[-- Attachment #1 --] Adam Vande More schrieb am 18.02.2010 17:28 (localtime): > On Thu, Feb 18, 2010 at 10:24 AM, Harald Schmalzbauer > <h.schmalzbauer@omnilan.de <mailto:h.schmalzbauer@omnilan.de>> wrote: > > The problem is not with the windows box, these transfer rates are > sensible. The problem is with two RELENG_8 machines. > > 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 get > the idea right... If I don't understamd things going on when > transfers make sense, I won't be able to determine what happens when > transfers are slowed down... > > > Have you considered the possibility it's not a tcp issue at all, maybe a > nic driver? I did, but then the transfers to the windows box were also affected I guess. 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 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 [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.13 (FreeBSD) iEYEARECAAYFAkt9bRcACgkQLDqVQ9VXb8gZxwCfdtMmof4G3tA+tYILQqCHk2OZ Xg8Ani0pzk5zU7D6Fee8Ineg/lXdRo5r =+BjT -----END PGP SIGNATURE-----
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