From: Bill Huey (Hui) <billh@gnuppy.monkey.org>
To: Andrew Morton <akpm@digeo.com>
Cc: wli@holomorphy.com, lm@work.bitmover.com, mbligh@aracnet.com,
davidsen@tmr.com, greearb@candelatech.com,
linux-kernel@vger.kernel.org,
"Bill Huey (Hui)" <billh@gnuppy.monkey.org>
Subject: Re: Minutes from Feb 21 LSE Call
Date: Mon, 24 Feb 2003 02:11:36 -0800 [thread overview]
Message-ID: <20030224101136.GA7063@gnuppy.monkey.org> (raw)
In-Reply-To: <20030224015625.2c258894.akpm@digeo.com>
On Mon, Feb 24, 2003 at 01:56:25AM -0800, Andrew Morton wrote:
> But that is speculation as well - I never observed this aspect to be
> a real problem. Probably, it was not.
>
> Substantiation of your claim requires quality testing and a plausible
> explanation. I do not believe we have seen either, OK?
Well, let's back off here. It's not my claim, it's Robert Love's in that
URL. Not to arrange a fight, but I had to point that out. :)
> > http://linuxdevices.com/articles/AT6106723802.html
>
> I did, briefly. It appears to be claiming that the average scheduling
> latency of the non-preemptible kernel is ten milliseconds!
They mention that this is related to the console code. Obviously, if you're
not checking for reschedule in a big pix map scroll blit, then it's going
to stick out boldly as a big latency spike.
A fully preemptive system would only turn off preemption in places that
would break drivers and other obvious places like scheduler run-queues,
etc...
> Maybe I need to read that again in the morning.
It's also an old article, but goes over a lot of the basics of a fully
preemptable kernel like that. Things might not be as dramatic now with
2.5.62. Not sure how things are now...
bill
next prev parent reply other threads:[~2003-02-24 10:04 UTC|newest]
Thread overview: 289+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.44.0302221417120.2686-100000@coffee.psychology.mcmaster.ca>
[not found] ` <1510000.1045942974@[10.10.2.4]>
2003-02-22 19:56 ` Minutes from Feb 21 LSE Call Larry McVoy
2003-02-22 20:24 ` William Lee Irwin III
2003-02-22 21:02 ` Martin J. Bligh
2003-02-22 22:06 ` Mark Hahn
2003-02-22 22:17 ` William Lee Irwin III
2003-02-22 23:28 ` Larry McVoy
2003-02-22 23:47 ` Martin J. Bligh
2003-02-23 0:09 ` Gerrit Huizenga
2003-02-23 8:01 ` Larry McVoy
2003-02-23 8:05 ` William Lee Irwin III
2003-02-24 18:36 ` Andy Pfiffer
2003-02-22 22:44 ` Ben Greear
2003-02-23 23:29 ` Bill Davidsen
2003-02-23 23:37 ` Martin J. Bligh
2003-02-24 4:57 ` Larry McVoy
2003-02-24 6:10 ` Gerhard Mack
2003-02-24 6:52 ` Larry McVoy
2003-02-24 7:46 ` Bill Huey
2003-02-24 7:44 ` Bill Huey
2003-02-24 7:54 ` William Lee Irwin III
2003-02-24 8:00 ` Bill Huey
2003-02-24 8:40 ` Andrew Morton
2003-02-24 8:50 ` William Lee Irwin III
2003-02-24 16:17 ` yodaiken
2003-02-24 23:13 ` William Lee Irwin III
2003-02-24 23:27 ` yodaiken
2003-02-24 23:54 ` William Lee Irwin III
2003-02-24 23:54 ` yodaiken
2003-02-25 2:17 ` Bill Huey
2003-02-25 2:24 ` yodaiken
2003-02-25 2:35 ` Bill Huey
2003-02-25 2:43 ` Bill Huey
2003-02-25 2:32 ` Larry McVoy
2003-02-25 2:40 ` Bill Huey
2003-02-25 5:24 ` Rik van Riel
2003-02-25 15:30 ` Alan Cox
2003-02-25 14:59 ` Bill Huey
2003-02-25 15:44 ` yodaiken
2003-02-26 19:31 ` Bill Davidsen
2003-02-27 0:56 ` Bill Huey
2003-02-27 20:04 ` Bill Davidsen
2003-02-25 2:07 ` Bill Huey
2003-02-25 2:14 ` Larry McVoy
2003-02-25 2:24 ` Bill Huey
2003-02-25 2:46 ` Valdis.Kletnieks
2003-02-25 14:47 ` Mr. James W. Laferriere
2003-02-25 15:59 ` Jesse Pollard
2003-02-24 8:56 ` Bill Huey
2003-02-24 9:09 ` Andrew Morton
2003-02-24 9:24 ` Bill Huey
2003-02-24 9:56 ` Andrew Morton
2003-02-24 10:11 ` Bill Huey [this message]
2003-02-24 14:40 ` Bill Davidsen
2003-02-24 21:10 ` Andrea Arcangeli
2003-02-24 8:43 ` William Lee Irwin III
2003-02-22 23:10 ` Martin J. Bligh
2003-02-22 23:20 ` Larry McVoy
2003-02-22 23:46 ` Martin J. Bligh
2003-02-25 2:19 ` Hans Reiser
2003-02-25 3:49 ` Martin J. Bligh
2003-02-25 5:12 ` Steven Cole
2003-02-25 20:37 ` Scott Robert Ladd
2003-02-25 21:36 ` Hans Reiser
2003-02-25 23:28 ` Scott Robert Ladd
2003-02-25 23:41 ` Hans Reiser
2003-02-26 0:19 ` Scott Robert Ladd
2003-02-26 0:35 ` Hans Reiser
2003-02-26 16:31 ` Horst von Brand
2003-02-26 0:47 ` Steven Cole
2003-02-26 16:07 ` Horst von Brand
2003-02-26 19:47 ` Alan Cox
2003-02-26 6:04 ` Aaron Lehmann
2003-02-26 0:44 ` Alan Cox
2003-02-25 23:58 ` Scott Robert Ladd
2003-02-22 23:15 ` Larry McVoy
2003-02-22 23:23 ` Christoph Hellwig
2003-02-22 23:54 ` Mark Hahn
2003-02-22 23:44 ` Martin J. Bligh
2003-02-24 4:56 ` Larry McVoy
2003-02-24 5:06 ` William Lee Irwin III
2003-02-24 6:00 ` Mark Hahn
2003-02-24 6:02 ` William Lee Irwin III
2003-02-24 15:06 ` Alan Cox
2003-02-24 23:18 ` William Lee Irwin III
2003-02-24 5:16 ` Martin J. Bligh
2003-02-24 6:58 ` Larry McVoy
2003-02-24 7:39 ` Martin J. Bligh
2003-02-24 16:17 ` Larry McVoy
2003-02-24 16:49 ` Martin J. Bligh
2003-02-25 0:41 ` Server shipments [was Re: Minutes from Feb 21 LSE Call] Larry McVoy
2003-02-25 0:41 ` Martin J. Bligh
2003-02-25 0:54 ` Larry McVoy
2003-02-25 2:00 ` Tupshin Harper
2003-02-25 3:54 ` Martin J. Bligh
2003-02-25 3:00 ` Martin J. Bligh
2003-02-25 3:13 ` Larry McVoy
2003-02-25 4:11 ` Martin J. Bligh
2003-02-25 4:17 ` Larry McVoy
2003-02-25 4:21 ` Martin J. Bligh
2003-02-25 4:37 ` Larry McVoy
2003-02-25 22:02 ` Gerrit Huizenga
2003-02-25 23:19 ` Larry McVoy
2003-02-25 23:46 ` Gerhard Mack
2003-02-26 4:23 ` Jesse Pollard
2003-02-26 5:05 ` William Lee Irwin III
2003-02-26 5:27 ` Bernd Eckenfels
2003-02-26 9:36 ` Eric W. Biederman
2003-02-26 12:09 ` Jesse Pollard
2003-02-26 16:42 ` Geert Uytterhoeven
2003-02-25 17:37 ` Andrea Arcangeli
2003-02-25 1:09 ` David Lang
2003-02-24 18:22 ` Minutes from Feb 21 LSE Call John W. M. Stevens
2003-02-24 7:51 ` William Lee Irwin III
2003-02-24 15:47 ` Larry McVoy
2003-02-24 16:00 ` Martin J. Bligh
2003-02-24 16:23 ` Benjamin LaHaise
2003-02-24 16:25 ` yodaiken
2003-02-24 18:20 ` Gerrit Huizenga
2003-02-25 1:51 ` Minutes from Feb 21 LSE Call - publishing performance data Craig Thomas
2003-02-24 16:31 ` Minutes from Feb 21 LSE Call Larry McVoy
2003-02-24 23:36 ` William Lee Irwin III
2003-02-25 0:23 ` Larry McVoy
2003-02-25 2:37 ` Werner Almesberger
2003-02-25 4:42 ` William Lee Irwin III
2003-02-25 4:54 ` Larry McVoy
2003-02-25 6:00 ` William Lee Irwin III
2003-02-25 7:00 ` Val Henson
2003-02-24 13:28 ` Alan Cox
2003-02-25 5:19 ` Chris Wedgwood
2003-02-25 5:26 ` William Lee Irwin III
2003-02-25 21:21 ` Chris Wedgwood
2003-02-25 21:14 ` Martin J. Bligh
2003-02-25 21:21 ` William Lee Irwin III
2003-02-25 22:08 ` Larry McVoy
2003-02-25 22:10 ` William Lee Irwin III
2003-02-25 22:37 ` Chris Wedgwood
2003-02-25 22:58 ` Larry McVoy
2003-02-25 6:17 ` Martin J. Bligh
2003-02-25 17:11 ` Cliff White
2003-02-25 17:17 ` William Lee Irwin III
2003-02-25 17:38 ` Linus Torvalds
2003-02-25 19:54 ` Dave Jones
2003-02-26 2:04 ` Linus Torvalds
2003-02-25 19:48 ` Martin J. Bligh
2003-02-25 21:28 ` William Lee Irwin III
2003-02-25 19:20 ` Alan Cox
2003-02-25 19:59 ` Scott Robert Ladd
2003-02-25 20:18 ` jlnance
2003-02-25 20:59 ` Scott Robert Ladd
2003-02-25 21:19 ` Chris Wedgwood
2003-02-25 21:38 ` Scott Robert Ladd
2003-02-24 18:44 ` Davide Libenzi
2003-02-22 23:57 ` Jeff Garzik
2003-02-23 23:57 ` Bill Davidsen
2003-02-24 6:22 ` Val Henson
2003-02-24 6:41 ` William Lee Irwin III
2003-02-22 21:29 ` Jeff Garzik
2003-02-24 2:04 linux
2003-02-24 2:39 ` Linus Torvalds
2003-02-24 3:28 ` David Lang
2003-02-26 5:30 ` Bernd Eckenfels
2003-02-26 5:42 ` William Lee Irwin III
2003-02-26 7:22 ` David Lang
2003-02-27 17:50 ` Daniel Egger
2003-02-27 18:25 ` David Lang
2003-02-28 8:58 ` Filip Van Raemdonck
2003-02-28 19:48 ` Arador
2003-03-01 0:51 ` Chris Wedgwood
2003-03-01 1:14 ` Davide Libenzi
2003-03-01 1:27 ` David Lang
2003-03-01 14:15 ` Daniel Egger
2003-02-24 4:42 ` Martin J. Bligh
2003-02-24 4:58 ` Linus Torvalds
-- strict thread matches above, loose matches on Subject: below --
2003-02-21 23:48 Hanna Linder
2003-02-22 0:16 ` Larry McVoy
2003-02-22 0:25 ` William Lee Irwin III
2003-02-22 2:24 ` Steven Cole
2003-02-22 0:44 ` Martin J. Bligh
2003-02-22 2:47 ` Larry McVoy
2003-02-22 4:32 ` Martin J. Bligh
2003-02-22 5:05 ` Larry McVoy
2003-02-22 6:39 ` Martin J. Bligh
2003-02-22 8:38 ` Jeff Garzik
2003-02-22 22:18 ` William Lee Irwin III
2003-02-23 0:50 ` Martin J. Bligh
2003-02-23 11:22 ` Magnus Danielson
2003-02-23 19:54 ` Eric W. Biederman
2003-02-23 1:17 ` Benjamin LaHaise
2003-02-23 5:21 ` Gerrit Huizenga
2003-02-23 8:07 ` David Lang
2003-02-23 8:20 ` William Lee Irwin III
2003-02-23 19:17 ` Linus Torvalds
2003-02-23 19:29 ` David Mosberger
2003-02-23 20:13 ` Martin J. Bligh
2003-02-23 22:01 ` David Mosberger
2003-02-23 22:12 ` Martin J. Bligh
2003-02-23 21:34 ` Linus Torvalds
2003-02-23 22:40 ` David Mosberger
2003-02-23 22:48 ` David Lang
2003-02-23 22:54 ` David Mosberger
2003-02-23 22:56 ` David Lang
2003-02-24 0:40 ` Linus Torvalds
2003-02-24 2:32 ` David Mosberger
2003-02-24 2:54 ` Linus Torvalds
2003-02-24 3:08 ` David Mosberger
2003-02-24 21:42 ` Andrea Arcangeli
2003-02-24 1:06 ` dean gaudet
2003-02-24 1:56 ` David Mosberger
2003-02-24 2:15 ` dean gaudet
2003-02-24 3:11 ` David Mosberger
2003-02-23 23:06 ` Martin J. Bligh
2003-02-23 23:59 ` David Mosberger
2003-02-24 3:49 ` Gerrit Huizenga
2003-02-24 4:07 ` David Mosberger
2003-02-24 4:34 ` Martin J. Bligh
2003-02-24 5:02 ` Gerrit Huizenga
2003-02-23 20:21 ` Xavier Bestel
2003-02-23 20:50 ` Martin J. Bligh
2003-02-23 23:57 ` Alan Cox
2003-02-24 1:26 ` Kenneth Johansson
2003-02-24 1:53 ` dean gaudet
2003-02-23 21:35 ` Alan Cox
2003-02-23 21:41 ` Linus Torvalds
2003-02-24 0:01 ` Bill Davidsen
2003-02-24 0:36 ` yodaiken
2003-02-23 21:15 ` John Bradford
2003-02-23 21:45 ` Linus Torvalds
2003-02-24 1:25 ` Benjamin LaHaise
2003-02-23 21:55 ` William Lee Irwin III
2003-02-23 19:13 ` David Mosberger
2003-02-23 23:28 ` Benjamin LaHaise
2003-02-26 8:46 ` Eric W. Biederman
2003-02-23 20:48 ` Gerrit Huizenga
2003-02-23 9:37 ` William Lee Irwin III
2003-02-22 8:38 ` David S. Miller
2003-02-22 8:38 ` David S. Miller
2003-02-22 14:34 ` Larry McVoy
2003-02-22 15:47 ` Martin J. Bligh
2003-02-22 16:13 ` Larry McVoy
2003-02-22 16:29 ` Martin J. Bligh
2003-02-22 16:33 ` Larry McVoy
2003-02-22 16:39 ` Martin J. Bligh
2003-02-22 16:59 ` John Bradford
2003-02-24 18:00 ` Timothy D. Witham
2003-02-22 8:32 ` David S. Miller
2003-02-22 18:20 ` Alan Cox
2003-02-22 20:05 ` William Lee Irwin III
2003-02-22 21:35 ` Alan Cox
2003-02-22 21:36 ` Gerrit Huizenga
2003-02-22 21:42 ` Christoph Hellwig
2003-02-23 23:23 ` Bill Davidsen
2003-02-24 3:31 ` Gerrit Huizenga
2003-02-24 4:02 ` Larry McVoy
2003-02-24 4:15 ` Russell Leighton
2003-02-24 5:11 ` William Lee Irwin III
2003-02-24 8:07 ` Christoph Hellwig
2003-02-23 0:37 ` Eric W. Biederman
2003-02-23 0:42 ` Eric W. Biederman
2003-02-23 14:29 ` Rik van Riel
2003-02-23 17:28 ` Eric W. Biederman
2003-02-24 1:42 ` Benjamin LaHaise
2003-02-23 3:24 ` Andrew Morton
2003-02-25 17:17 ` Andrea Arcangeli
2003-02-25 17:43 ` William Lee Irwin III
2003-02-25 17:59 ` Andrea Arcangeli
2003-02-25 18:04 ` William Lee Irwin III
2003-02-25 18:50 ` William Lee Irwin III
2003-02-25 19:18 ` Andrea Arcangeli
2003-02-25 19:27 ` Martin J. Bligh
2003-02-25 20:30 ` Andrea Arcangeli
2003-02-25 20:53 ` Martin J. Bligh
2003-02-25 21:17 ` Andrea Arcangeli
2003-02-25 21:12 ` Martin J. Bligh
2003-02-25 22:16 ` Andrea Arcangeli
2003-02-25 22:17 ` Martin J. Bligh
2003-02-25 22:37 ` Andrea Arcangeli
2003-02-25 21:26 ` William Lee Irwin III
2003-02-25 22:18 ` Andrea Arcangeli
2003-02-26 5:24 ` Rik van Riel
2003-02-26 5:38 ` William Lee Irwin III
2003-02-26 6:01 ` Martin J. Bligh
2003-02-26 6:14 ` William Lee Irwin III
2003-02-26 6:32 ` William Lee Irwin III
2003-02-26 16:02 ` Rik van Riel
2003-02-27 3:48 ` Daniel Phillips
2003-02-25 20:10 ` William Lee Irwin III
2003-02-25 20:23 ` Andrea Arcangeli
2003-02-25 20:46 ` William Lee Irwin III
2003-02-25 20:52 ` Andrea Arcangeli
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