On Sat, Aug 29, 2009 at 10:25 AM, erik quanstrom <quanstro@quanstro.net>wrote:

> > Now that I've had a chance to really examine the system, I'm noticing a
> > rather high interrupt count (1584), and I'm not exactly sure how to
> figure
> > out what's triggering them.
>
> i set HZ=1000.  so that accounts for 1000 of them.  i've also modified
> /dev/irqalloc to count up the interrupts, so you should get a rough idea
> of which irqs are responsible.  i say rough because chaned interrupts
> can confuse the matter a bit.
>
> > I did not install venti.  I just configured my ip address for DHCP, and
> I've
> > got aux/timesync running (I think that was suspect before for some
> reason).
> >  Stats shows interrupts as a solid rectangle of activity all the time.
>
> i get that too from stats.  it's just tuned to HZ=100.  the reason for the
> increase is so that millisecond sleeps can work a bit better.  on all the
> systems i use, the overhead is not worth worring about.
>

Ah, I see so these are just normal interrupts of a healthy beating heart of
a system.  :-)

I was a little concerned I had configured something incorrectly.

Thanks for the explanation.


>
> - erik
>
>