[Xenomai-core] Fwd: How to fix static priority to processes known in advance

[Xenomai-core] Fwd: How to fix static priority to processes known in advance

[tarek ben ali]

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---------- Forwarded message ----------
From: tarek ben ali <tarekbenali@domain.hid>
Date: 2009/11/3
Subject: How to fix static priority to processes known in advance
To: xenomai@xenomai.org


Hi All,
I am beginner to Xenomai i have implemented Xenomai 2.4.5 on a 2.6.26
Kernel.I'm wondering how can I set priority
to processes known in advance,some ideas or code please.I count on your
boost.
regards,
Tarek

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Re: [Xenomai-core] Fwd: How to fix static priority to processes known in advance

[Gilles Chanteperdrix]

tarek ben ali wrote:
> 
> 
> ---------- Forwarded message ----------
> From: *tarek ben ali* <tarekbenali@domain.hid <mailto:tarekbenali@domain.hid>>
> Date: 2009/11/3
> Subject: How to fix static priority to processes known in advance
> To: xenomai@xenomai.org <mailto:xenomai@xenomai.org>
> 
> 
> Hi All,
> I am beginner to Xenomai i have implemented Xenomai 2.4.5 on a 2.6.26
> Kernel.I'm wondering how can I set priority
> to processes known in advance,some ideas or code please.I count on your
> boost.
> regards,
> Tarek

You can not do that, every task has to know its priority, and set it, or
can be created with a specific priority.

-- 
                                          Gilles

Re: [Xenomai-help] [Xenomai-core] Fwd: How to fix static priority to processes known in advance

[Gilles Chanteperdrix]

tarek ben ali wrote:
> Thanks for your reply,
> Can I do this with /sched_setscheduler/()
> <http://www.opengroup.org/onlinepubs/000095399/functions/sched_setscheduler.html>
> function by indicates the pid of the process that I want to set its
> priority?
> 
sched_setscheduler() allows to set the priority of an existing process.
sched_setscheduler() does not set the priorities of Xenomai threads.

Anyway, when running Xenomai, you usually want to give a high priority
only to some particular threads. See:

http://www.xenomai.org/documentation/xenomai-2.4/html/api/group__posix__sched.html
-- 
                                          Gilles