Re: poor ethernet performance?

[Jonathan M. Bresler]

> We have previously done many network performance tests for our 
> products running on FreeBSD ... 
> 
> We have found that when ever there is disk accessing involved, it
> is not a good idea to look at the transfer figures.  We did tests
> with ftp and is was slow (compared to only memory generated data 
> e.g. ttcp)
> 
> 1. If you want to test the network speed ... use ttcp or something
>    that generates the data and doesn't read it from disk.
> 

        absolutely right.

        netperf generates its own data on the fly.  it does not
generate any disk activity.


> 2. When doing full-duplex and using fxp cards, stay away from X-over
>    cables ... use a full-duplex switch etc. ... the fxp cards are not
>    made to work with X-over cables (as far as I know - ala Intel spec)
>    note ... only for full-duplex tests.

        hmm....i have used intel cards on a cross-over cable regularly
without any problems whatsoever.

jmb


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