tuning for high connection rates

[Stanislav Sedov]

On Wed, Dec 05, 2007 at 04:03:29PM +0100 Philipp Wuensche mentioned:
> Adrian Chadd wrote:
> > On 05/12/2007, Philipp Wuensche <cryx-freebsd at h3q.com> wrote:
> > 
> >> As I understand it, and correct me if I'm wrong, polling helps against
> >> high interrupt rates but for that intel gigabit cards have interrupt
> >> moderation. We don't have a problem with interrupts (20% CPU) at the
> >> moment but with system (100% CPU) as you can see in the system
> >> monitoring graphs. Interrupts sometimes peak at, but usually are under,
> >> the 2k interrupts/sec limit.
> > 
> > Begin by reading up on the hardware profiling support (hwpmc, pmc,
> > etc) and see if you can get some system and process-specific profiling
> > information.
> 
> Oh interesting stuff, I definitely have to take a look into that. Nice.
> 

You can find a good tutorial on hwpmc by Robert Watson here:
http://lists.freebsd.org/pipermail/freebsd-current/2006-February/061096.html

-- 
Stanislav Sedov
ST4096-RIPE