From owner-freebsd-current  Wed Dec 22 22:19: 2 1999
Delivered-To: freebsd-current@freebsd.org
Received: from apollo.backplane.com (apollo.backplane.com [216.240.41.2])
	by hub.freebsd.org (Postfix) with ESMTP id 63E9014D8C
	for <freebsd-current@FreeBSD.ORG>; Wed, 22 Dec 1999 22:19:00 -0800 (PST)
	(envelope-from dillon@apollo.backplane.com)
Received: (from dillon@localhost)
	by apollo.backplane.com (8.9.3/8.9.1) id WAA16656;
	Wed, 22 Dec 1999 22:18:56 -0800 (PST)
	(envelope-from dillon)
Date: Wed, 22 Dec 1999 22:18:56 -0800 (PST)
From: Matthew Dillon <dillon@apollo.backplane.com>
Message-Id: <199912230618.WAA16656@apollo.backplane.com>
To: Julian Elischer <julian@whistle.com>,
	Bill Paul <wpaul@skynet.ctr.columbia.edu>,
	"B. Scott Michel" <scottm@CS.UCLA.EDU>,
	Jonathan Lemon <jlemon@americantv.com>,
	Brad Knowles <brad@shub-internet.org>,
	Joe Abley <jabley@patho.gen.nz>,
	Poul-Henning Kamp <phk@critter.freebsd.dk>,
	Garrett Wollman <wollman@khavrinen.lcs.mit.edu>,
	freebsd-current@FreeBSD.ORG
Subject: Woa!  May have found something - 'rl' driver and small packets (was Re: Odd TCP glitches in new currents)
References: <Pine.BSF.4.10.9912222023410.50586-100000@current1.whistle.com> <199912230451.UAA15739@apollo.backplane.com> <199912230547.VAA16324@apollo.backplane.com>
Sender: owner-freebsd-current@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

    I'm adding Bill Paul to the list specifically.

    Hmm.  Now this is odd!  I think I may have found something!

    All of my 'rl' driver cards fail this test:

	apollo# linktest -m 0.1:0.2 -s 16 -f16 lander
	lander# linktest -m 0.1:0.2 -s 16 -f16 apollo

	They get about 1% packet loss with the test.  Always.  
	100BaseTX full or half duplex, or 10BaseT -- I still get
	failures.

	rl0: <RealTek 8139 10/100BaseTX> irq 11 at device 3.0 on pci0
	rl0: Ethernet address: 00:50:ba:d1:89:05
	miibus0: <MII bus> on rl0

    All of my 'fxp' driver cards succeed with the above test perfectly.
    If I test an fxp machine verses an 'rl' machine, linktest shows that
    the 'rl' cards can transmit small packets just fine but they lose
    out trying to receive them!

	(test3 has an 'fxp' driver, apollo has an 'rl' driver.  Both are
	on the same switch!)

	test3(216.240.41.13)->apollo.backplane.com      lost 79/89027
	test3(216.240.41.13)->apollo.backplane.com      lost 80/89990
	test3(216.240.41.13)->apollo.backplane.com      lost 81/90953
	test3(216.240.41.13)->apollo.backplane.com      lost 82/92879
	test3(216.240.41.13)->apollo.backplane.com      lost 83/93842
	test3(216.240.41.13)->apollo.backplane.com      lost 84/94805
	test3(216.240.41.13)->apollo.backplane.com      lost 85/96730

    Methinks there is something going on with the 'rl' driver and/or
    the RealTek cards!

					-Matt
					Matthew Dillon 
					<dillon@backplane.com>




To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message