Subject: Re[2]: calculation in UDP
To: None <tech-net@netbsd.org>
From: Thomas Finneid <tfinneid@ifi.uio.no>
List: tech-net
Date: 12/09/2002 02:04:34
On Sun, 8 Dec 2002 23:41:48 +0100 Manuel Bouyer <bouyer@antioche.eu.org> wrote:

> On Sun, Dec 08, 2002 at 08:50:59PM +0100, Thomas Finneid wrote:
> > I did observe some off behaviour with the ip layer processing though,
> which
> > is that the processing times with the hw checksumming is slightly
> higher
> > than the processing times without it. Take a look at the measurement
> > results at (these are preliminary results)
> > 
> > http://www.stud.ifi.uio.no/~tfinneid/results/meta-data-p003-g003.html
> 
> Hum, and I didn't look closely, but it's possible that the hardware
> checksum feature doesn't work for fragmented packets ...

An interresting suggestion, I shall consider that when looking at it. 

I will probably have to create a new measurement plan to investigate the
effects of the interaction between the transport/network/link levels when
it comes to checksumming procedures.

Thanks.

-- 
Thomas Finneid

email: tfinneid@ifi.uio.no