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Subject: Re: Minimum time slice for relaible Linux execution
From: Dario Faggioli <raistlin@linux.it>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: limp <johnkyr83@hotmail.com>, linux-kernel@vger.kernel.org
In-Reply-To: <20110331151214.GB14441@home.goodmis.org>
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	 <20110331151214.GB14441@home.goodmis.org>
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Date: Fri, 01 Apr 2011 10:05:10 +0200
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On Thu, 2011-03-31 at 11:12 -0400, Steven Rostedt wrote:=20
> On Thu, Mar 31, 2011 at 01:13:55PM +0100, limp wrote:
> > Dear all,
> >=20
> > I have developed a framework similar to a hypervisor that switches betw=
een
> > Linux and a RT domain.
> > As RT priority is of highest importance, I want to give more time to th=
e RT
> > domain *but* I also want to give Linux adequate time for being able to
> > operate.
> >=20
> I'm not sure there is any requirement. The only problem I guess that can
> happen is if you give such little time that the timer interrupt can't
> finish, or that every time you schedule Linux back in, the timer
> interrupt goes off and nothing else gets done.
>=20
Right. Moreover, what you're doing seems very very similar to what these
guys do: https://www.rtai.org/ , http://www.xenomai.org/ .

I've never checked if (and if yes how) they do such thing as you're
thinking, but maybe they do... Have you already looked at them?

Regards,
Dario

--=20
<<This happens because I choose it to happen!>> (Raistlin Majere)
----------------------------------------------------------------------
Dario Faggioli, ReTiS Lab, Scuola Superiore Sant'Anna, Pisa  (Italy)

http://retis.sssup.it/people/faggioli -- dario.faggioli@jabber.org

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