CPU utilisation cap?

[lukem.freebsd at cse.unsw.edu.au]

On Thu, 21 Oct 2004, Sean Chittenden wrote:
> There are two things that come to mind.  The first being a patch that should 
> have been applied in time for 5.2, but I forget the timing of the releases.
>
> http://lists.freebsd.org/mailman/htdig/cvs-src/2003-October/012628.html
>
> IIRC, there was another commit that made a similar change specifically in the 
> handling of UDP packets, such that it used a TAILQ append instead of 
> traversing a linked list.  For some reason I think this happened after 5.2, 
> but I'm not able to find high nor low of the commit and could be pulling said 
> memory into existence.  Too many commits to keep track of.

While this would reduce CPU utilisation at a given throughput, it doesn't
account for the 20% of CPU time that is available but never used.

-- 
Luke