From: Mike Galbraith <efault@gmx.de>
To: Con Kolivas <kernel@kolivas.org>
Cc: Ingo Molnar <mingo@elte.hu>,
linux kernel mailing list <linux-kernel@vger.kernel.org>,
ck list <ck@vds.kolivas.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2
Date: Tue, 13 Mar 2007 06:10:39 +0100 [thread overview]
Message-ID: <1173762639.7944.45.camel@Homer.simpson.net> (raw)
In-Reply-To: <8cd998d50703121551u44ea3d85g2541503373f461f4@mail.gmail.com>
On Tue, 2007-03-13 at 09:51 +1100, Con Kolivas wrote:
> On 13/03/07, Mike Galbraith <efault@gmx.de> wrote:
> > As soon as your cpu is fully utilized, fairness looses or interactivity
> > loses. Pick one.
>
> That's not true unless you refuse to prioritise your tasks
> accordingly. Let's take this discussion in a different direction. You
> already nice your lame processes. Why? You already have the concept
> that you are prioritising things to normal or background tasks. You
> say so yourself that lame is a background task. Stating the bleedingly
> obvious, the unix way of prioritising things is via nice. You already
> do that. So moving on from that...
Sure. If a user wants to do anything interactive, they can indeed nice
19 the rest of their box before they start.
> Your test case you ask "how can I maximise cpu usage". Well you know
> the answer already. You run two threads. I won't dispute that.
>
> The debate seems to be centered on whether two tasks that are niced +5
> or to a higher value is background. In my opinion, nice 5 is not
> background, but relatively less cpu. You already are savvy enough to
> be using two threads and nicing them. All I ask you to do when using
> RSDL is to change your expectations slightly and your settings from
> nice 5 to nice 10 or 15 or even 19. Why is that so offensive to you?
It's not "offensive" to me, it is a behavioral regression. The
situation as we speak is that you can run cpu intensive tasks while
watching eye-candy. With RSDL, you can't, you feel the non-interactive
load instantly. Doesn't the fact that you're asking me to lower my
expectations tell you that I just might have a point?
> Please don't pick 5.none of the above. Please try to work with me on this.
I'm not trying to be pig-headed. I'm of the opinion that fairness is
great... until you strictly enforce it wrt interactive tasks.
-Mike
next prev parent reply other threads:[~2007-03-13 5:10 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-11 3:57 [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2 Con Kolivas
2007-03-11 11:39 ` Mike Galbraith
2007-03-11 11:48 ` Con Kolivas
2007-03-11 12:08 ` Mike Galbraith
2007-03-11 12:10 ` Ingo Molnar
2007-03-11 12:20 ` Mike Galbraith
2007-03-11 21:18 ` Mike Galbraith
2007-03-12 7:22 ` Mike Galbraith
2007-03-12 7:48 ` Con Kolivas
2007-03-12 8:29 ` Con Kolivas
2007-03-12 8:55 ` Mike Galbraith
2007-03-12 9:22 ` Con Kolivas
2007-03-12 9:38 ` Mike Galbraith
2007-03-12 10:27 ` Con Kolivas
2007-03-12 10:57 ` Mike Galbraith
2007-03-12 11:08 ` Ingo Molnar
2007-03-12 11:23 ` Con Kolivas
2007-03-12 13:48 ` Theodore Tso
2007-03-12 18:09 ` Con Kolivas
2007-03-12 14:34 ` Mike Galbraith
2007-03-12 15:26 ` Linus Torvalds
2007-03-12 18:10 ` Con Kolivas
2007-03-12 19:36 ` Peter Zijlstra
2007-03-12 20:36 ` Mike Galbraith
2007-03-13 4:17 ` Kyle Moffett
2007-03-13 8:09 ` Ingo Molnar
2007-03-12 18:49 ` Con Kolivas
2007-03-12 19:06 ` Xavier Bestel
2007-03-13 17:21 ` Valdis.Kletnieks
2007-03-12 20:11 ` Mike Galbraith
2007-03-12 20:38 ` Con Kolivas
2007-03-12 20:45 ` Mike Galbraith
2007-03-12 22:51 ` Con Kolivas
2007-03-13 5:10 ` Mike Galbraith [this message]
2007-03-13 5:53 ` Con Kolivas
2007-03-13 6:08 ` [ck] " Rodney Gordon II
2007-03-13 6:17 ` Mike Galbraith
2007-03-13 7:53 ` Mike Galbraith
2007-03-13 8:22 ` Ingo Molnar
2007-03-13 8:18 ` Ingo Molnar
2007-03-13 8:22 ` Mike Galbraith
2007-03-13 9:21 ` Con Kolivas
2007-03-13 9:29 ` Ingo Molnar
2007-03-13 9:41 ` Con Kolivas
2007-03-13 10:50 ` Bill Huey
2007-03-13 9:31 ` [ck] " Con Kolivas
2007-03-13 10:24 ` Xavier Bestel
2007-03-13 23:19 ` Sanjoy Mahajan
2007-03-13 9:33 ` Mike Galbraith
2007-03-13 9:39 ` Ingo Molnar
2007-03-13 10:06 ` Con Kolivas
2007-03-13 11:23 ` Mike Galbraith
2007-03-13 11:41 ` Serge Belyshev
2007-03-13 11:46 ` Mike Galbraith
2007-03-13 15:36 ` John Stoffel
2007-03-13 14:17 ` Matt Mackall
2007-03-13 15:15 ` David Schwartz
2007-03-13 17:59 ` Jeremy Fitzhardinge
2007-03-13 19:58 ` David Schwartz
2007-03-13 20:10 ` Jeremy Fitzhardinge
2007-03-13 20:35 ` Bill Huey
2007-03-13 20:27 ` Bill Huey
2007-03-16 16:42 ` Pavel Machek
2007-03-12 23:43 ` David Lang
2007-03-13 2:23 ` Lee Revell
2007-03-13 6:00 ` David Lang
2007-03-12 21:34 ` [ck] " jos poortvliet
2007-03-12 21:38 ` michael chang
2007-03-13 0:09 ` Thibaut VARENE
2007-03-13 6:08 ` Mike Galbraith
2007-03-13 6:16 ` Con Kolivas
2007-03-13 6:30 ` Mike Galbraith
2007-03-12 20:42 ` Peter Zijlstra
2007-03-12 21:05 ` Serge Belyshev
2007-03-12 21:41 ` Mike Galbraith
2007-03-12 11:25 ` Mike Galbraith
2007-03-12 9:38 ` Xavier Bestel
2007-03-12 10:34 ` Con Kolivas
2007-03-12 16:38 ` Kasper Sandberg
2007-03-14 2:25 ` Valdis.Kletnieks
2007-03-14 3:25 ` Gabriel C
2007-03-14 9:44 ` Xavier Bestel
2007-03-12 8:44 ` Mike Galbraith
2007-03-11 14:32 ` Gene Heskett
2007-03-12 6:58 ` Radoslaw Szkodzinski
2007-03-12 11:16 ` Gene Heskett
2007-03-12 11:49 ` Gene Heskett
2007-03-12 11:58 ` Con Kolivas
2007-03-12 16:38 ` Gene Heskett
2007-03-12 18:34 ` Gene Heskett
2007-03-12 19:53 Al Boldi
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