2005-09-28 05:15:20

by Eshwar

Subject: TCP Network performance degade from 2.4.18 to 2.6.10

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

2005-09-28 16:35:41

by Stephen Hemminger

Subject: Re: TCP Network performance degade from 2.4.18 to 2.6.10

On Wed, 28 Sep 2005 10:42:22 +0530
"Eshwar" <[email protected]> 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 [email protected]

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.