From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 8 Jan 2001 05:20:47 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 8 Jan 2001 05:20:37 -0500 Received: from horus.its.uow.edu.au ([130.130.68.25]:31973 "EHLO horus.its.uow.edu.au") by vger.kernel.org with ESMTP id ; Mon, 8 Jan 2001 05:20:23 -0500 Message-ID: <3A5995CF.7AEFFBBD@uow.edu.au> Date: Mon, 08 Jan 2001 21:26:23 +1100 From: Andrew Morton X-Mailer: Mozilla 4.7 [en] (X11; I; Linux 2.4.0-test8 i586) X-Accept-Language: en MIME-Version: 1.0 To: Tim Sailer CC: linux-kernel@vger.kernel.org Subject: Re: Network Performance? In-Reply-To: <20010104013340.A20552@bnl.gov>, <20010104013340.A20552@bnl.gov>; <20010105140021.A2016@bnl.gov> <3A56FD6C.93D09ABB@uow.edu.au>, <3A56FD6C.93D09ABB@uow.edu.au>; from andrewm@uow.edu.au on Sat, Jan 06, 2001 at 10:11:40PM +1100 <20010107235123.B6028@bnl.gov> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Tim Sailer wrote: > > On Sat, Jan 06, 2001 at 10:11:40PM +1100, Andrew Morton wrote: > > this issue was discussed on the netdev mailing list a few weeks > > back. > > > > It's very unfortunate that the web archives of netdev > > stopped working several months ago and there now appears > > to be no web archive of netdev@oss.sgi.com. > > > > Go to http://oss.sgi.com/projects/netdev/archive/ and > > pull down the November and December archives. > > > > The subject was "linux to solaris tcp issues on WAN". > > > > The conclusion was "The problem is also fixed with > > 2.4.0-test12pre3". Dunno about kernel 2.2 though. > > Well, on Friday, we pulled down the 'official' 2.4.0, and had the > same experience... nothing better. Should I get the -test12-pre3 kernel > and try that one specifically? I doubt if that would help. I claim no expertise in this area, but perhaps we can get some protocol gurus interested. To recap: You're sending and receiving FTP/TCP/IP4 to Solaris and AIX hosts You have a 1000kbyte window size You have an 80 megabit/sec pipe. You're getting 1.8 megabits/sec. What is the round-trip time on the WAN? Packet loss? Does the problem occur in both directions? Are you _sure_ the window size is being set correctly? How is it being set? Are you able to generate TCP dumps when the problem is happening? - - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/