rtems_message_queue_receive / rtems_event_receive issues

[Catalin Demergian]

Hi,
I'm logging what rtems_clock_get_ticks_since_boot returns to know when I
call _Scheduler_priority_Ready_queue_enqueue
and _Scheduler_priority_Ready_queue_extract, but I'm getting the same
number, I can't tell the order. My question is,
do you know if there is something I can call that gives me microsecond
precision ?

regards,
Catalin


On Mon, Oct 22, 2018 at 4:37 PM Catalin Demergian <demergian at gmail.com>
wrote:

> Hi,
> I see _Scheduler_priority_Ready_queue_enqueue
> calls _Chain_Append_unprotected
> which has an interesting comment
>  * @note It does NOT disable interrupts to ensure the atomicity of the
>  *       append operation.
>
> Catalin
>
>
> On Mon, Oct 22, 2018 at 4:08 PM Sebastian Huber <
> sebastian.huber at embedded-brains.de> wrote:
>
>> On 22/10/2018 15:00, Catalin Demergian wrote:
>> > I started to look in the ready queues implementation. I added a debug
>> > patch tracing my tasks having priority=100.
>> > The way I see it, a task can enter a ready queue only
>> >
>> with _Scheduler_priority_Ready_queue_enqueue/_Scheduler_priority_Ready_queue_enqueue_first
>> > and can be removed only by _Scheduler_priority_Ready_queue_extract.
>>
>> Yes.
>>
>> > I logged what rtems_clock_get_ticks_since_boot returns for every task
>> > and what I found was that for SCrx task this value is way behind the
>> > value for
>> > other tasks, meaning after a point is not added in the ready queue
>> > anymore.
>> > I tried with debugger too, following the next pointers to see what's
>> > in the ready_queue[100] and my task is not there, even if I see the
>> > state is ready
>> > when doing task command in shell.
>> > any idea what might be causing this?
>>
>> The thread state is Thread_Control::current_state, the code sequences to
>> block/unblock a thread should take care that ready threads
>> (current_state == 0) are visible to the scheduler (enqueued). Something
>> might have gone wrong during a non-ready to ready thread state transition.
>>
>> --
>> Sebastian Huber, embedded brains GmbH
>>
>> Address : Dornierstr. 4, D-82178 Puchheim, Germany
>> Phone   : +49 89 189 47 41-16
>> Fax     : +49 89 189 47 41-09
>> E-Mail  : sebastian.huber at embedded-brains.de
>> PGP     : Public key available on request.
>>
>> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
>>
>>
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