From owner-freebsd-net@FreeBSD.ORG  Thu May  3 16:17:44 2012
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Date: Thu, 3 May 2012 18:37:36 +0200
From: Luigi Rizzo <rizzo@iet.unipi.it>
To: net@freebsd.org, current@freebsd.org
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Subject: Re: Some performance measurements on the FreeBSD network stack
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On Thu, Apr 19, 2012 at 03:30:18PM +0200, Luigi Rizzo wrote:
> I have been running some performance tests on UDP sockets,
> using the netsend program in tools/tools/netrate/netsend
> and instrumenting the source code and the kernel do return in
> various points of the path. Here are some results which
> I hope you find interesting.
...

I have summarized the info on this thread in the camera ready
version of an upcoming Usenix paper, which you can find here:

http://info.iet.unipi.it/~luigi/papers/20120503-netmap-atc12.pdf

cheers
luigi