Using AMP in Rtems 4.10, issues using global message queues

[Diego Mercado]

thanks!, we will continue working on this.


El vie., 14 de dic. de 2018 a la(s) 03:31, Sebastian Huber (
sebastian.huber at embedded-brains.de) escribió:

> Hello Diego,
>
> On 13/12/2018 13:31, Diego Mercado wrote:
> > Hello,
> > I am using AMP in Rtems 4.10 and using message queues to share data
> > between nodes. I had no problems using queues until I add a task that
> > make several rtems_message_queue_receive, after a while the node that
> > receives from the queue crashes (using the debugger I saw it crashed
> > in: "rtems_mpci_entry Shm_Get_packet()"). No issues when receiving
> > messages if I set the "no wait" option:
> > rtems_message_queue_receive(rtemsId, data, size, RTEMS_NO_WAIT, 0);
> > But if I set a wait, for example, of 1 second:
> > rtems_message_queue_receive(rtemsId, data, size, RTEMS_WAIT, 100);
> > then the node that is blocked in the queue reception stop running
> > after several calls to rtems_message_queue_receive. With a shared
> > memory area of 0x1000 bytes rtems_message_queue_receive can be called
> > 9 times and the next time it stops. With 0x2000 bytes: 19 calls and it
> > crash with the following one. With 0x3000 bytes: 29 calls and then it
> > stops. It seems that the shared memory area is filled?
> >
> > I do not see any errors, program just stop running (the other node
> > runs correctly).
> > For local queues we have no problems.
> > Do you have any idea why this is happening?
> >
> > thanks in advance
> > Diego
> >
> > /* Override default SHM configuration */
> > shm_config_table BSP_shm_cfgtbl =
> > { .base = (void *) 0x40000000, .length = 0x1000 };
>
> I think you have a very specific problem and it is unlikely that someone
> on the mailing list faced this before. I would try to unit test the
> packet transfer mechanism and use a debugger to figure out what is going
> on.
>
> --
> 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
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>
> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
>
>
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