Re: [Xenomai-help] Sporadic PC freeze after rt_task_start

["M. Koehrer" <mathias_koehrer@domain.hid>]

Hi Jan,

as I mentioned in my first mail on this topic, I have extracted this example from a huge
real time application where the system sporadically freezes.
What I have found out there was, that the system freeze happened always when trying
to start a thread (in the original application, the tasks run fairly long).
I think it has to do with rt_task_start() followed by usleep() and the non-realtime stuff running
on CPU 0 and the realtime stuff running on CPU 1.
I never saw that issue on a single core CPU (even if the same SMP kernel was used).

Regards

Mathias


> M. Koehrer wrote:
> > Hi Jan,
> > 
> > yes, it terminates nicely.
> > I have attached my config.
> 
> Nothing obvious. Leaves us with probable timing differences or the
> different versions of our setups (I found this over 2.3.2 and trunk).
> 
> OK, further analysis on your side would be appreciated. E.g. trying the
> latest release, switching on debug features in Xenomai like the NMI
> watchdog or nucleus debugging. Also, nailing down what service call
> precisely locks up (the join, the termination of the task, etc.) would
> be good to reduce the search space.
> 
> Jan
> 
> 
> 
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> 
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-- 
Mathias Koehrer
mathias_koehrer@domain.hid


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