From: Daniel Phillips <phillips@arcor.de>
To: Linus Torvalds <torvalds@transmeta.com>,
"Richard B. Johnson" <root@chaos.analogic.com>
Cc: <linux-kernel@vger.kernel.org>
Subject: Re: HZ, preferably as small as possible
Date: Wed, 17 Jul 2002 23:16:25 +0200 [thread overview]
Message-ID: <E17Uw9p-0004QY-00@starship> (raw)
In-Reply-To: <Pine.LNX.4.44.0207171359000.6820-100000@home.transmeta.com>
On Wednesday 17 July 2002 23:02, Linus Torvalds wrote:
> 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.
I see lots of stuff in there all right, but I don't see anything that
implements the numerator/denominator error analysis technique I
described above. Maybe I just didn't look hard enough.
--
Daniel
next prev parent reply other threads:[~2002-07-17 21:12 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-10 19:59 HZ, preferably as small as possible Grover, Andrew
2002-07-10 21:09 ` george anzinger
2002-07-11 6:03 ` Hannu Savolainen
2002-07-11 7:15 ` george anzinger
2002-07-12 0:36 ` Stevie O
2002-07-12 0:50 ` Thunder from the hill
2002-07-12 0:55 ` Robert Love
2002-07-12 0:58 ` Thunder from the hill
2002-07-12 1:24 ` Alan Cox
2002-07-12 1:37 ` Mark Hahn
2002-07-12 1:09 ` george anzinger
2002-07-12 1:26 ` Roland Dreier
2002-07-12 17:30 ` george anzinger
2002-07-12 1:35 ` Stevie O
2002-07-12 3:01 ` Bernd Eckenfels
2002-07-11 12:54 ` Thunder from the hill
2002-07-11 15:59 ` Martin Dalecki
2002-07-10 21:28 ` Andrew Morton
2002-07-10 21:35 ` Benjamin LaHaise
2002-07-10 21:38 ` Andrew Morton
2002-07-10 21:42 ` Benjamin LaHaise
2002-07-11 2:14 ` CaT
2002-07-11 17:01 ` Martin Dalecki
2002-07-10 22:01 ` Thunder from the hill
2002-07-10 22:09 ` Cort Dougan
2002-07-11 13:36 ` Whoa... (was: Re: HZ, preferably as small as possible) Mark Mielke
2002-07-11 21:08 ` Daniel Phillips
2002-07-10 22:41 ` HZ, preferably as small as possible Thunder from the hill
2002-07-10 22:47 ` Thunder from the hill
2002-07-10 22:49 ` Eli Carter
2002-07-10 23:05 ` Thunder from the hill
2002-07-10 23:08 ` Dave Mielke
2002-07-10 23:13 ` Thunder from the hill
2002-07-10 23:50 ` J.A. Magallon
2002-07-11 0:28 ` Lincoln Dale
2002-07-11 11:35 ` Kasper Dupont
2002-07-11 12:30 ` Alan Cox
2002-07-11 13:37 ` Kasper Dupont
2002-07-11 15:46 ` Alan Cox
2002-07-11 18:51 ` george anzinger
2002-07-15 5:06 ` Linus Torvalds
2002-07-15 16:26 ` Robert Love
2002-07-15 18:56 ` Linus Torvalds
2002-07-15 19:52 ` mbs
2002-07-15 20:01 ` yodaiken
2002-07-16 11:41 ` Vojtech Pavlik
2002-07-17 19:33 ` Daniel Phillips
2002-07-17 20:31 ` Richard B. Johnson
2002-07-17 20:40 ` Daniel Phillips
2002-07-17 21:02 ` Richard B. Johnson
2002-07-17 21:02 ` Linus Torvalds
2002-07-17 21:16 ` Daniel Phillips [this message]
2002-07-18 12:57 ` Richard B. Johnson
2002-07-18 13:25 ` Daniel Phillips
2002-07-18 10:10 ` Kai Henningsen
2002-07-17 20:55 ` Linus Torvalds
-- strict thread matches above, loose matches on Subject: below --
2002-07-11 2:46 Grover, Andrew
2002-07-11 3:01 ` Jeff Garzik
2002-07-11 11:45 ` Alan Cox
2002-07-11 17:08 ` Martin Dalecki
2002-07-11 19:21 ` Albert D. Cahalan
2002-07-16 9:17 ` Kai Henningsen
2002-07-11 20:34 ` Bill Davidsen
2002-07-12 12:01 ` Martin Dalecki
2002-07-15 5:15 ` Linus Torvalds
2002-07-15 6:56 ` Albert D. Cahalan
2002-07-15 8:24 ` Russell King
2002-07-15 15:48 ` David Mosberger
2002-07-15 18:20 ` Albert D. Cahalan
2002-07-15 18:30 ` David Mosberger
2002-07-15 16:07 ` Albert D. Cahalan
2002-07-15 17:06 ` Russell King
2002-07-15 18:43 ` Albert D. Cahalan
2002-07-15 18:53 ` Russell King
2002-07-15 18:50 ` Linus Torvalds
2002-07-15 20:15 ` Albert D. Cahalan
2002-07-15 8:58 ` Dave Mielke
2002-07-11 7:09 ` george anzinger
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