From: Rogan Dawes <lists@dawes.za.net>
To: Chris Friesen <cfriesen@nortel.com>
Cc: Ingo Molnar <mingo@elte.hu>,
Linus Torvalds <torvalds@linux-foundation.org>,
Nick Piggin <npiggin@suse.de>,
Gene Heskett <gene.heskett@gmail.com>,
Juliusz Chroboczek <jch@pps.jussieu.fr>,
Mike Galbraith <efault@gmx.de>,
linux-kernel@vger.kernel.org,
Peter Williams <pwil3058@bigpond.net.au>,
ck list <ck@vds.kolivas.org>,
Thomas Gleixner <tglx@linutronix.de>,
William Lee Irwin III <wli@holomorphy.com>,
Andrew Morton <akpm@linux-foundation.org>,
Bill Davidsen <davidsen@tmr.com>, Willy Tarreau <w@1wt.eu>,
Arjan van de Ven <arjan@infradead.org>
Subject: Re: [REPORT] cfs-v4 vs sd-0.44
Date: Tue, 24 Apr 2007 17:07:35 +0200 [thread overview]
Message-ID: <462E1D37.3060008@dawes.za.net> (raw)
In-Reply-To: <462E1C2E.30406@nortel.com>
Chris Friesen wrote:
> Rogan Dawes wrote:
>
>> I guess my point was if we somehow get to an odd number of
>> nanoseconds, we'd end up with rounding errors. I'm not sure if your
>> algorithm will ever allow that.
>
> And Ingo's point was that when it takes thousands of nanoseconds for a
> single context switch, an error of half a nanosecond is down in the noise.
>
> Chris
My concern was that since Ingo said that this is a closed economy, with
a fixed sum/total, if we lose a nanosecond here and there, eventually
we'll lose them all.
Some folks have uptimes of multiple years.
Of course, I could (very likely!) be full of it! ;-)
Rogan
next prev parent reply other threads:[~2007-04-24 15:08 UTC|newest]
Thread overview: 149+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-20 14:04 [patch] CFS scheduler, v4 Ingo Molnar
2007-04-20 21:37 ` Gene Heskett
2007-04-21 20:47 ` S.Çağlar Onur
2007-04-22 1:22 ` Gene Heskett
2007-04-20 21:39 ` mdew .
2007-04-21 6:47 ` Ingo Molnar
2007-04-21 7:55 ` [patch] CFS scheduler, v4, for v2.6.20.7 Ingo Molnar
2007-04-21 12:12 ` [REPORT] cfs-v4 vs sd-0.44 Willy Tarreau
2007-04-21 12:40 ` Con Kolivas
2007-04-21 13:02 ` Willy Tarreau
2007-04-21 15:46 ` Ingo Molnar
2007-04-21 16:18 ` Willy Tarreau
2007-04-21 16:34 ` Linus Torvalds
2007-04-21 16:42 ` William Lee Irwin III
2007-04-21 18:55 ` Kyle Moffett
2007-04-21 19:49 ` Ulrich Drepper
2007-04-21 23:17 ` William Lee Irwin III
2007-04-21 23:35 ` Linus Torvalds
2007-04-22 1:46 ` Ulrich Drepper
2007-04-22 7:02 ` William Lee Irwin III
2007-04-22 7:17 ` Ulrich Drepper
2007-04-22 8:48 ` William Lee Irwin III
2007-04-22 16:16 ` Ulrich Drepper
2007-04-23 0:07 ` Rusty Russell
2007-04-21 16:53 ` Willy Tarreau
2007-04-21 16:53 ` Ingo Molnar
2007-04-21 16:57 ` Willy Tarreau
2007-04-21 18:09 ` Ulrich Drepper
2007-04-21 17:03 ` Geert Bosch
2007-04-21 15:55 ` Con Kolivas
2007-04-21 16:00 ` Ingo Molnar
2007-04-21 16:12 ` Willy Tarreau
2007-04-21 16:39 ` William Lee Irwin III
2007-04-21 17:15 ` Jan Engelhardt
2007-04-21 19:00 ` Ingo Molnar
2007-04-22 13:18 ` Mark Lord
2007-04-22 13:27 ` Ingo Molnar
2007-04-22 13:30 ` Mark Lord
2007-04-25 8:16 ` Pavel Machek
2007-04-25 8:22 ` Ingo Molnar
2007-04-25 10:19 ` Alan Cox
2007-04-21 22:54 ` Denis Vlasenko
2007-04-22 0:08 ` Con Kolivas
2007-04-22 4:58 ` Mike Galbraith
2007-04-21 23:59 ` Con Kolivas
2007-04-22 13:04 ` Juliusz Chroboczek
2007-04-22 23:24 ` Linus Torvalds
2007-04-23 1:34 ` Nick Piggin
2007-04-23 15:56 ` Linus Torvalds
2007-04-23 19:11 ` Ingo Molnar
2007-04-23 19:52 ` Linus Torvalds
2007-04-23 20:33 ` Ingo Molnar
2007-04-23 20:44 ` Ingo Molnar
2007-04-23 21:03 ` Ingo Molnar
2007-04-23 21:53 ` Guillaume Chazarain
2007-04-24 7:04 ` Rogan Dawes
2007-04-24 7:31 ` Ingo Molnar
2007-04-24 8:25 ` Rogan Dawes
2007-04-24 15:03 ` Chris Friesen
2007-04-24 15:07 ` Rogan Dawes [this message]
2007-04-24 15:15 ` Chris Friesen
2007-04-24 23:55 ` Peter Williams
2007-04-25 9:29 ` Ingo Molnar
2007-04-23 22:48 ` Jeremy Fitzhardinge
2007-04-24 0:59 ` Li, Tong N
2007-04-24 1:57 ` Bill Huey
2007-04-24 18:01 ` Li, Tong N
2007-04-24 21:27 ` William Lee Irwin III
2007-04-24 22:18 ` Bernd Eckenfels
2007-04-25 1:22 ` Li, Tong N
2007-04-25 6:05 ` William Lee Irwin III
2007-04-25 9:44 ` Ingo Molnar
2007-04-25 11:58 ` William Lee Irwin III
2007-04-25 20:13 ` Willy Tarreau
2007-04-26 17:57 ` Li, Tong N
2007-04-26 19:18 ` Willy Tarreau
2007-04-28 15:12 ` Bernd Eckenfels
2007-04-26 23:26 ` William Lee Irwin III
2007-04-24 3:46 ` Peter Williams
2007-04-24 4:52 ` Arjan van de Ven
2007-04-24 6:21 ` Peter Williams
2007-04-24 6:36 ` Ingo Molnar
2007-04-24 7:00 ` Gene Heskett
2007-04-24 7:08 ` Ingo Molnar
2007-04-24 6:45 ` David Lang
2007-04-24 7:24 ` Ingo Molnar
2007-04-24 14:38 ` Gene Heskett
2007-04-24 17:44 ` Willy Tarreau
2007-04-25 0:30 ` Gene Heskett
2007-04-25 0:32 ` Gene Heskett
2007-04-24 7:12 ` Gene Heskett
2007-04-24 7:14 ` Ingo Molnar
2007-04-24 14:36 ` Gene Heskett
2007-04-24 7:25 ` Ingo Molnar
2007-04-24 14:39 ` Gene Heskett
2007-04-24 14:42 ` Gene Heskett
2007-04-24 7:33 ` Ingo Molnar
2007-04-26 0:51 ` SD renice recommendation was: " Con Kolivas
2007-04-24 15:08 ` Ray Lee
2007-04-25 9:32 ` Ingo Molnar
2007-04-23 20:05 ` Willy Tarreau
2007-04-24 21:05 ` 'Scheduler Economy' prototype patch for CFS Ingo Molnar
2007-04-23 2:42 ` [report] renicing X, cfs-v5 vs sd-0.46 Ingo Molnar
2007-04-23 15:09 ` Linus Torvalds
2007-04-23 17:19 ` Gene Heskett
2007-04-23 17:19 ` Gene Heskett
2007-04-23 19:48 ` Ingo Molnar
2007-04-23 20:56 ` Michael K. Edwards
2007-04-22 13:23 ` [REPORT] cfs-v4 vs sd-0.44 Mark Lord
2007-04-21 18:17 ` Gene Heskett
2007-04-22 1:26 ` Con Kolivas
2007-04-22 2:07 ` Gene Heskett
2007-04-22 8:07 ` William Lee Irwin III
2007-04-22 11:11 ` Gene Heskett
2007-04-22 1:51 ` Con Kolivas
2007-04-21 20:35 ` [patch] CFS scheduler, v4 S.Çağlar Onur
2007-04-22 8:30 ` Michael Gerdau
2007-04-23 22:47 ` Ingo Molnar
2007-04-23 1:12 ` [patch] CFS scheduler, -v5 Ingo Molnar
2007-04-23 1:25 ` Nick Piggin
2007-04-23 2:39 ` Gene Heskett
2007-04-23 3:08 ` Ingo Molnar
2007-04-23 2:55 ` Ingo Molnar
2007-04-23 3:22 ` Nick Piggin
2007-04-23 3:43 ` Ingo Molnar
2007-04-23 4:06 ` Nick Piggin
2007-04-23 7:10 ` Ingo Molnar
2007-04-23 7:25 ` Nick Piggin
2007-04-23 7:35 ` Ingo Molnar
2007-04-23 9:25 ` Ingo Molnar
2007-04-23 3:19 ` [patch] CFS scheduler, -v5 (build problem - make headers_check fails) Zach Carter
2007-04-23 10:03 ` Ingo Molnar
2007-04-23 5:16 ` [patch] CFS scheduler, -v5 Markus Trippelsdorf
2007-04-23 5:27 ` Markus Trippelsdorf
2007-04-23 6:21 ` Ingo Molnar
2007-04-25 11:43 ` Srivatsa Vaddagiri
2007-04-25 12:51 ` Ingo Molnar
2007-04-23 12:20 ` Guillaume Chazarain
2007-04-23 12:36 ` Ingo Molnar
2007-04-24 16:54 ` Christian Hesse
2007-04-25 9:25 ` Ingo Molnar
2007-04-25 10:51 ` Christian Hesse
2007-04-25 10:56 ` Ingo Molnar
2007-04-23 9:28 ` crash with CFS v4 and qemu/kvm (was: [patch] CFS scheduler, v4) Christian Hesse
2007-04-23 10:18 ` Ingo Molnar
2007-04-23 10:18 ` Ingo Molnar
2007-04-24 10:54 ` Christian Hesse
2007-04-24 10:54 ` Christian Hesse
-- strict thread matches above, loose matches on Subject: below --
2007-04-22 4:38 [REPORT] cfs-v4 vs sd-0.44 Al Boldi
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