All CPUs always running at profhz

[Martin Birgmeier]

I have systems running 7.4 and 8.2. The newer ones (in terms of age of 
hardware) are always running at profhz, i.e., when executing a "systat 
-vm 1" I see that all cores always get profhz interrupts per second.

An older machine running 7.4 is running at hz (which for this machine I 
set to kern.hz=200 in loader.conf).

Using ps -o ...,flags,... I see that no process has profiling turned on.

Why is this so?

Especially on laptops, I'd like to save power by lowering the interrupt 
rate.

Regards,

Martin

-- 
Martin Birgmeier
Vienna
Austria