From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 22 May 2001 17:39:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 22 May 2001 17:39:37 -0400 Received: from fenrus.demon.co.uk ([158.152.228.152]:13201 "EHLO amadeus.home.nl") by vger.kernel.org with ESMTP id ; Tue, 22 May 2001 17:39:20 -0400 Message-Id: Date: Tue, 22 May 2001 22:34:08 +0100 (BST) From: arjan@fenrus.demon.nl To: ionut@moisil.cs.columbia.edu (Ion Badulescu) Subject: Re: Xircom RealPort versus 3COM 3C3FEM656C cc: linux-kernel@vger.kernel.org In-Reply-To: <200105222118.f4MLISL01588@moisil.badula.org> X-Newsgroups: fenrus.linux.kernel User-Agent: tin/1.5.8-20010221 ("Blue Water") (UNIX) (Linux/2.4.3-6.0.1 (i586)) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org In article <200105222118.f4MLISL01588@moisil.badula.org> you wrote: > On Tue, 22 May 2001 20:10:41 +0100 (BST), Alan Cox wrote: >> Before you give up on the xircom thing, try the -ac kernel and set the box >> up to use xircom_cb not xircom_tulip_cb >> >> That might help a lot > It doesn't, it still performs poorly with any of the three available > drivers -- xircom_cb, xircom_tulip_cb, and tulip_cb (from the pcmcia package): > * Rx gets only about 1.8Mbit/s on a 100Base-TX network with any of the three > * Tx gets 80+Mb/s with xircom_tulip_cb and tulip_cb, and less than 30Mb/s > with xircom_cb. This sounds like a bug I have heard before: some switches don't work with the xircom card (well, our drivers for it) when doing full duplex. Could you try the latest driver from http://people.redhat.com/arjanv which forces the card to half-duplex? I manage to get 8Mbyte/sec with it without any problems. Greetings, Arjan van de Ven