Date: Mon, 8 Nov 2004 18:50:33 +0000 From: Paul Richards <paul@originative.co.uk> To: Kris Kennaway <kris@obsecurity.org> Cc: Max Laier <max@love2party.net> Subject: Re: cvs commit: src/sys/kern subr_param.c Message-ID: <20041108185033.GB34058@myrddin.originative.co.uk> In-Reply-To: <20041107000311.GA42221@xor.obsecurity.org> References: <200411061133.iA6BXhHT086940@repoman.freebsd.org> <20041106163748.GB38881@ip.net.ua> <200411061859.56624.max@love2party.net> <418D632E.2020402@root.org> <20041107000311.GA42221@xor.obsecurity.org>
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On Sat, Nov 06, 2004 at 04:03:12PM -0800, 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? :) I remember some code for the Commodore Pets that you could use to play notes on a nearby radio by tweaking some spinning loops. Quite a neat trick at the time since there wasn't any sound hardware. Paul.
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