Re: Network Performance Testing Summary

[David Rees]

On Wed, Jun 06, 2001 at 02:52:03AM +0000, John William wrote:
> 
> The curse of the HP Vectra XU 5/90 strikes again!
> 
> What is interesting is that I tried the NetGear FA310, FA311, 3COM 3cSOHO 
> and 3C905C-TX cards and both the receive and transmit speeds (measured with 
> both iperf and netperf) were so close to each other as to be a non-issue.
> 
> Several people e-mailed me to let me know that "card 'X' performance is 
> terrible, I can only get good performance with card 'Y'". So, I just thought 
> I should send this message out to set things a bit straight.

Did you monitor CPU usage during these tests?

I did some throughput comparing a DLink RTL8139 based card to a 3C905C-TX card on a K6-2 450.  
Both managed to fully saturate 100Mbps.  However, the DLink used up ~90% CPU, and the 3Com 
only used about 50% CPU.  This was on 2.4.5, with the 8139too driver from 2.4.3.

-Dave