Re: Network speed Linux-2.6.10

[Baruch Even <baruch@ev-en.org>]

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