From owner-freebsd-net Sun Dec 22 13: 6:21 2002 Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6F4C837B405; Sun, 22 Dec 2002 13:06:19 -0800 (PST) Received: from apollo.backplane.com (apollo.backplane.com [216.240.41.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id B565543EE6; Sun, 22 Dec 2002 13:06:18 -0800 (PST) (envelope-from dillon@apollo.backplane.com) Received: from apollo.backplane.com (localhost [127.0.0.1]) by apollo.backplane.com (8.12.5/8.12.5) with ESMTP id gBML6IOM032303; Sun, 22 Dec 2002 13:06:18 -0800 (PST) (envelope-from dillon@apollo.backplane.com) Received: (from dillon@localhost) by apollo.backplane.com (8.12.5/8.12.5/Submit) id gBML6INI032302; Sun, 22 Dec 2002 13:06:18 -0800 (PST) (envelope-from dillon) Date: Sun, 22 Dec 2002 13:06:18 -0800 (PST) From: Matthew Dillon Message-Id: <200212222106.gBML6INI032302@apollo.backplane.com> To: "matthew c. mead" Cc: Robert Watson , freebsd-net@FreeBSD.ORG Subject: Re: TCP interactions (was: Re: Linux and FreeBSD poor network performance) References: <20021221165745.A67089@goof.com> <20021222151259.A21189@goof.com> Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org By your description, it is almost certainly a packet loss problem... a cabling issue or a switch issue most likely. Try doing large pings, like this, and see if you get hicups: bsdbox# ping -i 0.1 -s 3000 linuxbox -Matt Matthew Dillon : :On Sun, Dec 22, 2002 at 10:59:52AM -0500, Robert Watson wrote: :> On Sat, 21 Dec 2002, matthew c. mead wrote: : :> > I have a Linux box and FreeBSD box sitting on a 100Mbit ethernet segment :> > that cannot seem to talk to one another faster than 150K/s. I've been :> > using scp, ftp, http, to test this. : :> And you've done tests in both directions, or just in one? : :Both. : :> Could you try using a non-TCP performance measurement tool of some sort? :> I.e., some sort of UDP throughput test. Because of your comment about the :> two boxes talking to windows fine, it sounds likely to be a TCP :> interaction, but it would be useful to check and see. : :I didn't get around to it before I started looking at :hardware/driver. I dropped a 3c905 into the Linux box and things :improved. I grabbed a new ethernet card elsewhere today and it :works just fine. : :> I've CC'd Matt Dillon because he's fixed a number of subtle TCP bugs of :> this sort in the past and can probably provide some debugging guidance. : :I think it's the Linux driver. Sorry for the false alert. This would :be a fun one to figure out if it were tcp stack interactions. :( : : :-matt : :-- :matthew c. mead : :http://www.goof.com/~mmead/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message