> it seems to me as APC interrupts on ipipe got lost. I have added two 
> counters: 
> One increments in schedule_linux_call() when a request for a specific 
> application 
> task is queued. Another one is incremented in lostage_handler() when the 
> specific task was waked up. When I output the counter's values after tasks 
> have
> freezed the counter of lostage_handler is exactly one value less than 
> schedule_linux_call's counter.
>
> And then, when I wake-up APC thread manually all freezed tasks continue for a 
> moment, until all are freezing again.

As said above waking APC thread using

  wake_up_process(rthal_apc_servers[smp_processor_id()]);

does reactivate all Xenomai threads for scheduling. Incontrast using

  rthal_apc_schedule(lostage_apc);

does not help. So it seems as APC interrupt is pending but won't be  executed.

Any idea?

Regards,
Christoph

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