Re: [Xenomai-help] rt_pipe and rt_queue problems

[Jan Kiszka <jan.kiszka@domain.hid>]

[-- Attachment #1: Type: text/plain, Size: 1126 bytes --]

Petr Cervenka wrote:
>>> So I tried to use rt_queue. But when I tried to read from queue with
>>> timeout (or TM_INFINITE), I got an EPERM error. That means: "service
>>> should block, but was called from a context, which cannot sleep.".
>>> But I want to sleep (and wait for new data). Where is the problem? Do
>>> you have any advice?
>> Is the read of the queue a Xenomai thread? It has to be, even if it will
>> mostly run in secondary (Linux) mode. Check also /proc/xenomai/sched
>> when you think it should be.
> Both tasks are created by rt_task_create and started by rt_task_start. They are also in /proc/xenomai/sched:
> CPU  PID    PRI      TIMEOUT  STAT       NAME
>   0  0       -1      0        R          ROOT/0
>   1  0       -1      0        R          ROOT/1
>   1  313     20      0        X          main_task
>   1  314     30      30195788906 w          hw_task
> Note: I'm still using your patch allowing to call rtdm_event_timedwait even in nrt.

The only thing I can recommend here: try reducing your code to the bare
minimum that still demonstrate the issue, then post it.

Jan


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 250 bytes --]