Date: Tue, 1 Mar 2005 17:51:43 -0700
From: Paul Dickson <dickson@permanentmail.com>
To: linux-os@analogic.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: Network speed Linux-2.6.10
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On Tue, 1 Mar 2005 14:29:24 -0500 (EST), linux-os wrote:

> Intel NIC e100 device driver. Two identical machines.
> Private network, no other devices. Connected using a Netgear switch.
> Test data is the same thing sent from memory on one machine
> to a discard server on another, using TCP/IP SOCK_STREAM.
> 
> If I set both machines to auto-negotiation OFF and half duplex,
> I get about 9 to 9.5 megabytes/second across the private wire
> network.
> 
> If I set one machine to full duplex and the other to half-duplex
> I get 10 to 11 megabytes/second transfer across the network,
> regardless of direction.
> 
> If I set both machines to auto-negotiation OFF and full duplex,
> I get 300 to 400 kilobytes/second regardless of the direction.

Might this be related to the broken BicTCP implementations in the 2.6.6+
kernels?  A fix was added around 2.6.11-rc3 or 4.

	-Paul

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