On Mon, Dec 15, 2014 at 11:42:40AM +0000, Stoidner, Christoph wrote:
>
> > 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?
Do you have the same issue if you run a kernel patched with Xenomai
and without the PREEMPT_RT patch?
--
Gilles.
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