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Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2

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From: Peter Zijlstra <a.p.zijlstra@...>
To: Mike Galbraith <efault@...>
Cc: Con Kolivas <kernel@...>, Ingo Molnar <mingo@...>, linux kernel mailing list <linux-kernel@...>, ck list <ck@...>, Linus Torvalds <torvalds@...>, Andrew Morton <akpm@...>
Subject: Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2
Date: Monday, March 12, 2007 - 4:42 pm

On Mon, 2007-03-12 at 21:11 +0100, Mike Galbraith wrote:


SCHED_IDLE or otherwise nice 19
 

Interaction wants low latency, getting that is traditionally expressed
in priorities - the highest prio gets the least latency (all RTOSs work
like that).

There is nothing that warrants giving them more CPU time IMHO; if you
think they deserve more, express that using priorities.

Priorities are a well understood concept and they work; heuristics can
(and Murphy tells us they will) go wrong.

Getting the server/client thing working can be done without heuristics
using class based scheduling.

-
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Messages in current thread:
[PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Con Kolivas, (Sat Mar 10, 11:57 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Sun Mar 11, 7:39 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Con Kolivas, (Sun Mar 11, 7:48 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Sun Mar 11, 8:08 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Ingo Molnar, (Sun Mar 11, 8:10 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Mon Mar 12, 3:22 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Con Kolivas, (Mon Mar 12, 3:48 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Con Kolivas, (Mon Mar 12, 4:29 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Mon Mar 12, 4:55 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Con Kolivas, (Mon Mar 12, 5:22 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Xavier Bestel, (Mon Mar 12, 5:38 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Con Kolivas, (Mon Mar 12, 6:34 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Kasper Sandberg, (Mon Mar 12, 12:38 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, , (Tue Mar 13, 10:25 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Gabriel C, (Tue Mar 13, 11:25 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Xavier Bestel, (Wed Mar 14, 5:44 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Mon Mar 12, 5:38 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Con Kolivas, (Mon Mar 12, 6:27 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Mon Mar 12, 6:57 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Ingo Molnar, (Mon Mar 12, 7:08 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Con Kolivas, (Mon Mar 12, 7:23 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Theodore Tso, (Mon Mar 12, 9:48 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Con Kolivas, (Mon Mar 12, 2:09 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Mon Mar 12, 10:34 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Linus Torvalds, (Mon Mar 12, 11:26 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Ingo Molnar, (Tue Mar 13, 4:09 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Kyle Moffett, (Tue Mar 13, 12:17 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Con Kolivas, (Mon Mar 12, 2:10 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Mon Mar 12, 4:36 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Peter Zijlstra, (Mon Mar 12, 3:36 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Con Kolivas, (Mon Mar 12, 2:49 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Mon Mar 12, 4:11 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Serge Belyshev, (Mon Mar 12, 5:05 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Mon Mar 12, 5:41 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Con Kolivas, (Mon Mar 12, 4:38 pm)
Re: [ck] Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6..., michael chang, (Mon Mar 12, 5:38 pm)
Re: [ck] Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6..., Thibaut VARENE, (Mon Mar 12, 8:09 pm)
Re: [ck] Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6..., Mike Galbraith, (Tue Mar 13, 2:08 am)
Re: [ck] Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2...., Con Kolivas, (Tue Mar 13, 2:16 am)
Re: [ck] Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2...., Mike Galbraith, (Tue Mar 13, 2:30 am)
Re: [ck] Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6..., jos poortvliet, (Mon Mar 12, 5:34 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Mon Mar 12, 4:45 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, David Lang, (Mon Mar 12, 7:43 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Lee Revell, (Mon Mar 12, 10:23 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, David Lang, (Tue Mar 13, 2:00 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Con Kolivas, (Mon Mar 12, 6:51 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Pavel Machek, (Fri Mar 16, 12:42 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Tue Mar 13, 1:10 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Ingo Molnar, (Tue Mar 13, 4:18 am)
RE: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, David Schwartz, (Tue Mar 13, 11:15 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Jeremy Fitzhardinge, (Tue Mar 13, 1:59 pm)
RE: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, David Schwartz, (Tue Mar 13, 3:58 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Bill Huey, (Tue Mar 13, 4:27 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Jeremy Fitzhardinge, (Tue Mar 13, 4:10 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Bill Huey, (Tue Mar 13, 4:35 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Tue Mar 13, 5:33 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Matt Mackall, (Tue Mar 13, 10:17 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Con Kolivas, (Tue Mar 13, 5:21 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Ingo Molnar, (Tue Mar 13, 5:29 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Con Kolivas, (Tue Mar 13, 5:41 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Bill Huey, (Tue Mar 13, 6:50 am)
Re: [ck] Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6..., Con Kolivas, (Tue Mar 13, 5:31 am)
Re: [ck] Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6..., Xavier Bestel, (Tue Mar 13, 6:24 am)
Re: [ck] Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6..., Sanjoy Mahajan, (Tue Mar 13, 7:19 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Con Kolivas, (Tue Mar 13, 1:53 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Ingo Molnar, (Tue Mar 13, 4:22 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Tue Mar 13, 3:53 am)
Re: [ck] Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6..., Rodney Gordon II, (Tue Mar 13, 2:08 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Tue Mar 13, 2:17 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Peter Zijlstra, (Mon Mar 12, 4:42 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Xavier Bestel, (Mon Mar 12, 3:06 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, , (Tue Mar 13, 1:21 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Mon Mar 12, 7:25 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Mon Mar 12, 4:44 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Sun Mar 11, 8:20 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Mike Galbraith, (Sun Mar 11, 5:18 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Gene Heskett, (Sun Mar 11, 10:32 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Radoslaw Szkodzinski, (Mon Mar 12, 2:58 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Gene Heskett, (Mon Mar 12, 7:16 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Gene Heskett, (Mon Mar 12, 7:49 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Con Kolivas, (Mon Mar 12, 7:58 am)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Gene Heskett, (Mon Mar 12, 12:38 pm)
Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2, Gene Heskett, (Mon Mar 12, 2:34 pm)