From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailgate.sysgo.de (ns.sysgo.de [213.68.67.98]) by ozlabs.org (Postfix) with ESMTP id 60FC32BC0F for ; Mon, 25 Oct 2004 17:14:13 +1000 (EST) From: Gerhard Jaeger To: Eugene Surovegin Date: Mon, 25 Oct 2004 08:47:00 +0200 References: <20041022085733.0c5289c8.Hiroshi_DOYU@montavista.co.jp> <20041022082955.GA27169@gate.ebshome.net> <20041025011654.GA3290@gate.ebshome.net> In-Reply-To: <20041025011654.GA3290@gate.ebshome.net> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Message-Id: <200410250847.00907.g.jaeger@sysgo.com> Cc: linuxppc-embedded@ozlabs.org Subject: Re: [BUG] IBM440GX works too slow under nfsroot List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Monday 25 October 2004 03:16, Eugene Surovegin wrote: > On Fri, Oct 22, 2004 at 01:29:55AM -0700, Eugene Surovegin wrote: > > FWIW, I haven't seen any problems when testing my new EMAC driver with > > 100Mb hub, maybe it's only 10Mb related. > > > > Anyway, this is first time I'm hearing about half duplex problems, > > Matt just mentioned them on IRC to me. > > > > I'll try to do some tests this weekend, although I have to admit half > > duplex doesn't seem very important these days, nevertheless, if this > > can be fixed, we better do this :). > > OK, I did some tests with 2.4.28-pre4, 2.6.9 & 2.6.9-emac (2.6.9 with > my new EMAC driver). I used Ocotea rev.3 with 440GX rev.C (533MHz). > > I can confirm I see some problems in 10HDX mode - there is visible > slow down during system boot up (NFS root). Just after logging into > system, nfsstat shows around 350 retransmits. > > My 2.6.9-emac tree doesn't show this behavior, I see no visible > slow-down and nfsstat shows 0 retransmits. > > I tried some quick hacks for 2.6.9 driver but was unable to find > settings which could help (my new driver was almost re-written from > scratch and I did a lot of things differently). Hmmm, that's what we also found out, nothing really helped. > For *adventurous*, this new EMAC driver is available as a patch against > 2.6.9 BK tree at http://kernel.ebshome.net/. Please, note, it's still > project in progress and it lacks support for all new 440GX features > (GigE, TAH, jumbo frames, EMAC2/EMAC3). This is NAPI version with > correct (I hope) error handling, chip access etc. On Ebony I was able > to route around 144Kpps. I plan to implement support for _some_ 440GX > new features soon (during next month, hopefully). I will give it a try ASAP. > > If there is an interest, I can make a patch against current 2.4 BK > tree, but this will take some time (I'm a little swamped right now). of course there's some interest, at least by me ;) Would be great if you'll find some time for that. Thank you, Gerhard