[lkml]   [2012]   [Nov]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectFwd: Re: Scheduler queues for less os-jitter?

------- Forwarded message -------
From: "Uwaysi Bin Kareem" <>
To: "Mike Galbraith" <>
Subject: Re: Scheduler queues for less os-jitter?
Date: Sun, 04 Nov 2012 02:19:39 +0100

On Thu, 11 Oct 2012 04:46:34 +0200, Mike Galbraith <> wrote:

> On Wed, 2012-10-10 at 20:13 +0200, Uwaysi Bin Kareem wrote:
>> I was just wondering, have you considered this?
>> If daemons are contributing to os-jitter, wouldn`t having them all on
>> their own queue reduce jitter? So people could have the stuff like in
>> Ubuntu they want, without affecting jitter, or needing stuff like Tiny
>> Core, for tiny jitter?
>> So you get (simplified) something like mainapp - process1 in queue 2,
>> mainapp - process2 in queue 2, mainapp - process 3 in queue 2, etc.
>> Or is that already batch maybe, lol.
> You could try SCHED_AUTOGROUP, or create whatever task groups manually,
> or use systemd to do that for you. Like everything else having anything
> to do with scheduling, all are double edged swords, so may help, may
> hurt.
> -Mike

Actually I did achieve this with fifo-relatime. Low jitter OpenGL seems to
be able to do, running the opengl app as realtime, with a low
sched_rt_period_us value and a high sched_rt_runtime_us value.

Peace Be With You.

 \ /
  Last update: 2012-11-04 03:01    [W:0.090 / U:0.448 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site