From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Tue, 11 Dec 2007 08:45:01 +0100
From: Wolfgang Grandegger <wg@domain.hid>
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Subject: Re: [Xenomai-core] How to cancel a Xenomai POSIX thread
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To: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Cc: xenomai-core <xenomai@xenomai.org>

Gilles Chanteperdrix wrote:
> Wolfgang Grandegger wrote:
>  > After adding pthread_getschedparam() I realized, that policy was 1 and
>  > prio 10 and not as expected 5. The corresponding attribute settings
>  > before calling pthread_create have been ignored somehow. Am I doing
>  > something wrong in task_init()?
> 
> Wait, what you observe here is that the low prio task inherits
> scheduling parameter from the high prio task. The default value for the
> inheritsched attribute is PTHREAD_INHERIT_SCHED. So, if you want to set
> explicitely the scheduling parameter, you should call
> pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED);

You are right. With PTHREAD_EXPLICIT_SCHED it works as expected with
2.6. With 2.4, it seems to be the default. I'm not really an advanced
POSIX/PTHREAD programmer :-(.

Wolfgang,