cvs commit: src/sys/kern subr_param.c

Robert Watson rwatson at
Sun Nov 7 09:54:57 PST 2004

On Sat, 6 Nov 2004, Kris Kennaway wrote:

> On Sat, Nov 06, 2004 at 03:50:06PM -0800, Nate Lawson wrote:
> > I was traveling out of the country so I didn't get a chance to comment. 
> >  The two caveats I'm aware of is a slight loss in processes that are 
> > CPU bound and an audio hum from ACPI CPU idling.  The latter is rather 
> > interesting actually.  At hz=100, it's just a quiet low buzz but at 
> > 1000, it is readily audible on many laptops and annoying.  Windows uses 
> > hz=1000 too and has the same problem.  I believe it's related to the 
> > capacitors and other devices charging/discharging when clocks are stopped.
> Can we play music by modulating the value of hz? :) 

"kldload snd_hurts"?

Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
robert at      Principal Research Scientist, McAfee Research

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