Re: TCP Network performance degade from 2.4.18 to 2.6.10

[Stephen Hemminger]

On Wed, 28 Sep 2005 10:42:22 +0530
"Eshwar" <eshwar@xxxxxxxxxxx> wrote:

> HI all,
> 
> I observed there is huge network performance drop from linux 2.4 to 2.6 with
> the same setup (No hardware changes..). The results are taken in PIV
> processor with D-Link network card... with iperf ... Can some body help me
> why such a huge difference... in TCP stream... 
> 
> In linux 2.4 (Redhat 9)
> 
> DLink	
>     TCP              UDP
> Tx       94.3Mbps    Tx               95 Mbps
> Rx       94.2 Mbps   Rx               95 Mbps
> 
> In linux 2.6.10 (Fedora Core 4)
> DLink	
> 	 TCP                     UDP
> Tx       64.3 Mbps 	Tx               87 Mbps
> Rx       88.1 Mbps      Rx               95 Mbps
> 
> 
> Thanks & Regards
> Eshwar

Please send network performance discussion to netdev@xxxxxxxxxxxxxxx

A lot more information is needed, like:
	* which hardware is on both ends of the test (lscpci)
	* any TCP configuration issues
	* any errors reported.
	* netfilter and firewalling.
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