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Date: Sun, 25 Aug 2002 19:58:32 +0200
From: Christophe Devalquenaire <C.Devalquenaire@wanadoo.fr>
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To: Donald Becker <becker@scyld.com>
CC: linux-kernel@vger.kernel.org
Subject: Re: 2.4 and 2.5 Problem ne.c driver
References: <Pine.LNX.4.44.0208251222280.1561-100000@beohost.scyld.com>
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Donald Becker wrote:
> 
> On Sun, 25 Aug 2002, Christophe Devalquenaire wrote:
> > kris wrote:
> > > kris wrote:
> > > >
> > > > I have 2 ne2000 isa cards (10Mbps for each) and with this versions of
> > > > kernel the bandwith is divided by 2. So 2*5Mbps = 10Mbps instead of
> > > > 2*10Mbps=20Mbps.
> > > > I try to fix the pbm.
> > >
> > > perhaps a bug exists on the dispatcher when 2 identical cards exist.
> > > Anyone have 2 identical cards for test ?
> >
> > After other tries, the ne.c file is buggy. Confirmation.
> > I investigate. Anyone helps me ?
> 
> Do you have evidence of a specific problem?
> Or the same hardware running faster with other drivers or kernel versions?
> 
> This sounds as if you are just running out of ISA bus bandwidth...

My configuration : a server with 2 cards NE2000(10 Mbps), a machine with
2 cards : 1 NE2000(ISA) and 1 3C905b(PCI).
server : NE2000 <-> workstation : NE2000  in 192.168.1.X
server : NE2000 <-> workstation : 3C905b  in 192.168.0.X

I try with a 2.4.6, 2.4.15, and 2.5.31. there is near from no
differences in the code of ne.c, gkrellm tells me that when I download
on both cards big files (for tests), the bandwidth falls to 5Mbps for
each card.
If 1 download stops, the other bandwidth is up to 10Mbps immediatly.

No other ISA card is used on the server.
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