high interrupt load under 6.0?

[Dan Nelson]

In the last episode (Feb 18), Wolfgang Zenker said:
> > I have a 486DX50 firewall that has been serving me well for a
> > number of years.  I recently upgraded it fro 5.4 to 6.0 and
> > performance plumeted rather drastically (about 40%).  I would like
> > to fix it.  What I have noticed is that even when sitting idle the
> > system spends ~20% of its time in interrupt.  Below I have included
> > dmesg, kernel config, and vmstat -i information.
> > [..]
> > interrupt                          total       rate
> > irq0: clk                      203894894       1000
> 
> a clock rate of 1000 Hz is probably to high for a 486 class cpu. You
> should add "options HZ=100" to your kernel config to get back to the
> 100 Hz that where default before 6.0

Or add kern.hz="100" to your /boot/loader.conf if you don't want to
rebuild your kernel.

-- 
	Dan Nelson
	dnelson at allantgroup.com