Messages in this thread |  | | Subject | Fwd: Re: Scheduler queues for less os-jitter? | Date | Sun, 04 Nov 2012 02:20:20 +0100 | From | Uwaysi Bin Kareem <> |
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------- Forwarded message ------- From: "Uwaysi Bin Kareem" <uwaysi.bin.kareem@paradoxuncreated.com> To: "Mike Galbraith" <efault@gmx.de> Cc: 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 <efault@gmx.de> 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.
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