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From: Mike Galbraith <efault@gmx.de>
To: Andrew Morton <akpm@osdl.org>
Cc: Con Kolivas <kernel@kolivas.org>,
	piggin@cyberone.com.au, linux-kernel@vger.kernel.org,
	mingo@elte.hu, felipe_alfaro@linuxmail.org
Subject: Re: [PATCH] O13int for interactivity
Date: Tue, 05 Aug 2003 09:53:45 +0200	[thread overview]
Message-ID: <5.2.1.1.2.20030805094944.01a00708@pop.gmx.net> (raw)
In-Reply-To: <20030804230337.703de772.akpm@osdl.org>

At 11:03 PM 8/4/2003 -0700, Andrew Morton wrote:
>Con Kolivas <kernel@kolivas.org> wrote:
> >
> > > In short: make the same policy for an interruptible and an 
> uninterruptible
> >  > sleep.
> >
> >  That's the policy that has always existed...
> >
> >  Interesting that I have only seen the desired effect and haven't 
> noticed any
> >  side effect from this change so far. I'll keep experimenting as much as
> >  possible (as if I wasn't going to) and see what the testers find as well.
>
>We do prefer that TASK_UNINTERRUPTIBLE processes are woken promptly so they
>can submit more IO and go back to sleep.  Remember that we are artificially
>leaving the disk head idle in the expectation that the task will submit
>more I/O.  It's pretty sad if the CPU scheduler leaves the anticipated task
>in the doldrums for five milliseconds.

It's actually (potentially) _much_ more than that isn't it?  Wakeups don't 
consider the last time a task has run... the awakened task is always placed 
at the back of the pack regardless of whether the tasks in front of it have 
been receiving heavy doses of cpu and the awakened task has not.

         -Mike 


  parent reply	other threads:[~2003-08-05  7:49 UTC|newest]

Thread overview: 83+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-08-04 16:07 [PATCH] O13int for interactivity Con Kolivas
2003-08-04 18:24 ` Felipe Alfaro Solana
2003-08-04 19:15 ` Antonio Vargas
2003-08-04 21:32   ` Con Kolivas
2003-08-04 20:11 ` Mike Galbraith
2003-08-04 22:11   ` Con Kolivas
2003-08-05  7:10     ` Mike Galbraith
2003-08-05  2:11 ` Nick Piggin
2003-08-05  2:20   ` Con Kolivas
2003-08-05  2:21     ` Nick Piggin
2003-08-05  3:06       ` Con Kolivas
2003-08-05  3:17         ` Nick Piggin
2003-08-06 18:48           ` Interactivity improvements Timothy Miller
2003-08-06 19:01             ` Mike Fedyk
2003-08-06 20:09             ` Helge Hafting
2003-08-06 21:15             ` Con Kolivas
2003-08-05  3:18       ` [PATCH] O13int for interactivity Con Kolivas
2003-08-05  3:31         ` Nick Piggin
2003-08-05  5:04           ` Con Kolivas
2003-08-05  5:12             ` Nick Piggin
2003-08-05  5:16               ` Con Kolivas
2003-08-05  5:28                 ` Nick Piggin
2003-08-05 10:22                   ` Con Kolivas
2003-08-05 10:32                     ` Nick Piggin
2003-08-05 10:45                       ` Con Kolivas
2003-08-05 10:48                         ` Nick Piggin
2003-08-05 10:56                           ` Con Kolivas
2003-08-05 11:03                             ` Nick Piggin
2003-08-05 11:12                               ` Con Kolivas
2003-08-05 11:23                                 ` Nick Piggin
2003-08-05 11:34                                   ` Con Kolivas
2003-08-05 10:54                         ` Arjan van de Ven
2003-08-05 11:10                           ` Con Kolivas
2003-08-06 21:33                       ` Timothy Miller
2003-08-06 21:33                         ` Con Kolivas
2003-08-07  0:27                           ` Timothy Miller
2003-08-07  0:27                             ` Con Kolivas
2003-08-07  0:44                               ` Timothy Miller
2003-08-11  6:48                       ` Rob Landley
2003-08-11 15:47                         ` William Lee Irwin III
2003-08-12  2:51                         ` Nick Piggin
2003-08-12  6:16                           ` Mike Galbraith
2003-08-12  7:07                             ` Nick Piggin
2003-08-12  7:18                               ` Nick Piggin
2003-08-12  9:42                                 ` Mike Galbraith
2003-08-12 21:11                                   ` Mike Fedyk
2003-08-13  6:55                                     ` Mike Galbraith
2003-08-12  9:22                               ` Mike Galbraith
2003-08-12  9:37                                 ` Nick Piggin
2003-08-12  9:48                                   ` Mike Galbraith
2003-08-12 10:29                           ` Rob Landley
2003-08-12 11:08                             ` Nick Piggin
2003-08-12 11:35                               ` Rob Landley
2003-08-12 11:58                                 ` Nick Piggin
2003-08-13  2:08                                   ` jw schultz
2003-08-13  3:07                                     ` Gene Heskett
2003-08-13  3:24                                       ` Nick Piggin
2003-08-13  5:24                                         ` Gene Heskett
2003-08-13  5:43                                           ` Andrew McGregor
2003-08-13 12:33                                             ` Gene Heskett
2003-08-14  5:03                                               ` Andrew McGregor
2003-08-14 10:48                                                 ` Gene Heskett
2003-08-12 15:36                           ` Timothy Miller
2003-08-05  6:03             ` Andrew Morton
2003-08-05  7:26               ` Con Kolivas
2003-08-05  8:12                 ` Oliver Neukum
2003-08-05  8:20                   ` Con Kolivas
2003-08-05  8:27                     ` Mike Galbraith
2003-08-05  8:43                       ` Con Kolivas
2003-08-05  9:09                         ` Mike Galbraith
2003-08-05  9:19                           ` Con Kolivas
2003-08-05 10:04                   ` Nick Piggin
2003-08-11  6:57                 ` Rob Landley
2003-08-11 15:58                   ` William Lee Irwin III
2003-08-05  7:53               ` Mike Galbraith [this message]
     [not found] <gQ4n.5oS.7@gated-at.bofh.it>
     [not found] ` <jUl6.5eh.1@gated-at.bofh.it>
     [not found]   ` <jUuT.5kZ.15@gated-at.bofh.it>
     [not found]     ` <jWn1.6K1.11@gated-at.bofh.it>
2003-08-13 13:48       ` Pascal Schmidt
2003-08-13 14:50         ` Gene Heskett
  -- strict thread matches above, loose matches on Subject: below --
2003-08-06 10:35 Voluspa
2003-08-04 19:12 Voluspa
2003-07-27 15:12 [PATCH] O10int " Con Kolivas
2003-07-28 18:08 ` Valdis.Kletnieks
2003-07-28 18:40   ` Andrew Morton
2003-08-04 18:51     ` [PATCH] O13int " Felipe Alfaro Solana
2003-08-04 18:58       ` Felipe Alfaro Solana
2003-08-04 21:46         ` Con Kolivas
2003-08-04 22:16           ` Felipe Alfaro Solana

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