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Date: Wed, 17 Jul 2002 14:02:39 -0700 (PDT)
From: Linus Torvalds <torvalds@transmeta.com>
To: "Richard B. Johnson" <root@chaos.analogic.com>
cc: Daniel Phillips <phillips@arcor.de>, <linux-kernel@vger.kernel.org>
Subject: Re: HZ, preferably as small as possible
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On Wed, 17 Jul 2002, Richard B. Johnson wrote:
>
> It is hardly novel and I can't imagine how Bresenham or whomever
> could make such a claim to the obvious. Even the DOS writer(s) used
> this technique to get one-second time intervals from the 18.206
> ticks/per second.

Ehh.. Look at _existing_ linux code to do exactly the same.

See update_wall_time_one_tick() and second_overflow() (which does a lot
more besides, but it does largely boil down to this "average fractions
using basic integer math" thing.

		Linus

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