Date: Wed, 22 Dec 1999 22:18:56 -0800 (PST) From: Matthew Dillon <dillon@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) Message-ID: <199912230618.WAA16656@apollo.backplane.com> References: <Pine.BSF.4.10.9912222023410.50586-100000@current1.whistle.com> <199912230451.UAA15739@apollo.backplane.com> <199912230547.VAA16324@apollo.backplane.com>
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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>
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