Re: Network speed Linux-2.6.10

[Baruch Even]

Paul Dickson wrote:
> 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.

Unlikely, the problem with BIC would have shown itself only at high 
speeds over long latency links, not over a lan connection.

Baruch
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