From: Philippe Gerum <rpm@xenomai.org>
To: Eric Eric <ericrebates@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] Scheduling questions...
Date: Fri, 25 Mar 2011 09:21:10 +0100 [thread overview]
Message-ID: <1301041270.2079.8.camel@domain.hid> (raw)
In-Reply-To: <AANLkTingRPWqG1SZAaNs4TKeJFXicZWGqmL2A1rT8vrf@domain.hid>
On Thu, 2011-03-24 at 19:47 -0400, Eric Eric wrote:
> Hello, I've been reading through some of the documentation and have a
> few questions regarding scheduling:
>
> - API docs say that rt_task_set_mode can allow a task to undergo
> round-robin scheduling. This seems to imply that we can have an
> environment of mixed round-robin and FIFO task scheduling. Is this
> correct? If so, what is the scheduling relationship between tasks
> running in FIFO and RR modes?
RR are FIFO threads within the same priority group.
>
> - I am concerned about Linux starvation. For example, suppose a
> misbehaving RT task spins and burns CPU indefinitely (watchdog
> notwithstanding). I would still like to preempt this task and allow
> Linux to run for up to some maximum time (say up to 30mS every 200mS).
> So, if using RR scheduling, is there a way to use rt_task_slice to
> allocate time to Linux? Is there a Linux shadow thread that I can
> allocate time to?
Xenomai implements sporadic server scheduling. See SCHED_SPORADIC,
usable with int pthread_setschedparam_ex().
>
> Thank you.
>
> - Eric
>
> _______________________________________________
> Xenomai-help mailing list
> Xenomai-help@domain.hid
> https://mail.gna.org/listinfo/xenomai-help
--
Philippe.
next prev parent reply other threads:[~2011-03-25 8:21 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-24 23:47 [Xenomai-help] Scheduling questions Eric Eric
2011-03-25 8:21 ` Philippe Gerum [this message]
2011-03-25 19:48 ` Eric Eric
2011-03-25 19:59 ` Philippe Gerum
2011-03-25 20:43 ` Eric Eric
2011-03-25 20:52 ` Philippe Gerum
2011-03-25 20:53 ` Philippe Gerum
2011-03-25 21:28 ` Eric Eric
2011-03-30 4:54 ` Philippe Gerum
2011-03-30 18:37 ` Eric Eric
2011-03-30 21:43 ` Gilles Chanteperdrix
2011-03-31 8:54 ` Philippe Gerum
2011-03-25 10:17 ` Gilles Chanteperdrix
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