[Xenomai] non-blocking rt_task_suspend(NULL)

Gilles Chanteperdrix gilles.chanteperdrix at xenomai.org
Wed Apr 16 11:08:21 CEST 2014

On 04/15/2014 02:42 PM, Petr Cervenka wrote:
> Hello I have a problem with the rt_task_suspend(NULL) call. I'm using
> it for synchronization of two (producer / consumer like) tasks. 1)
> When the consumer task has no work to do, it stops itself by calling
> of the rt_task_suspend(NULL). 2) When the producer creates new work
> for consumer, it wakes it up by calling of
> rt_task_resume(&consumerTask). The problem is, that consumer seldom
> switches to a state, that it sleeps by rt_task_suspend no more. And
> the task then takes all the CPU time. The return code is 0. But I
> already have seen couple of -4 (-EINTR) values in the past also.
> Consumer task status was 00300380 before and 00300184 (if there is
> small safety sleep present). I can use for example RT_EVENT variable
> instead, but I'm curious if you by chance don't know, what is
> happening? Xenomai 2.6.3, Linux 3.5.7

Could you post the example of code you are using to get this issue?


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