[Xenomai-help] rt_task_set_periodic() question

[Xenomai-help] rt_task_set_periodic() question

[Thomas Häberle]

Hello!

I am using Xenomai 2.3.5 with a Linux Kernel 2.4 on an MPC5200.

One of my periodic Xenomai tasks has to be rescheduled now and than for
some -for the question unimportant- reasons.
To do so I
1.) get the next planed release point with "rt_task_inquire(NULL, 
&tt_info)"
2.) add the desired delay to the sheduling point with "t_start = 
RTIME(tt_info.relpoint + delay)"
    (delay is always a positive value)
3.) call "rt_task_set_periodict_task_set_periodic( NULL, t_start, 
ONE_MS)" to reshedule the task

 From step 3 I get the return value "-110" which is "ETIMEDOUT" (AFAIK)
thus according to the Xenomai-documentation the calculated new 
sheduling  point allready passed.
I miss the point where I do something wrong!?!?
It doesn't seem to matter how much I increase "t_start", the return 
value stays at -110,
so I guess I missunderstood the usage of one of the functions!?!?

Any hints or suggestions?

Thanks & Greetings,
Thomas

Re: [Xenomai-help] rt_task_set_periodic() question

[Gilles Chanteperdrix]

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Thomas Häberle wrote:
> Hello!
> 
> I am using Xenomai 2.3.5 with a Linux Kernel 2.4 on an MPC5200.
> 
> One of my periodic Xenomai tasks has to be rescheduled now and than for
> some -for the question unimportant- reasons.
> To do so I
> 1.) get the next planed release point with "rt_task_inquire(NULL, 
> &tt_info)"
> 2.) add the desired delay to the sheduling point with "t_start = 
> RTIME(tt_info.relpoint + delay)"
>     (delay is always a positive value)
> 3.) call "rt_task_set_periodict_task_set_periodic( NULL, t_start, 
> ONE_MS)" to reshedule the task

Could you try the attached patch ?

-- 
                                                  Gilles.

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Index: ksrc/skins/native/task.c
===================================================================
--- ksrc/skins/native/task.c	(r������vision 4041)
+++ ksrc/skins/native/task.c	(copie de travail)
@@ -1120,7 +1120,8 @@ int rt_task_inquire(RT_TASK *task, RT_TA
 	info->bprio = xnthread_base_priority(&task->thread_base);
 	info->cprio = xnthread_current_priority(&task->thread_base);
 	info->status = xnthread_state_flags(&task->thread_base);
-	info->relpoint = xntimer_get_date(&task->thread_base.ptimer);
+	info->relpoint = xntimer_get_date(&task->thread_base.ptimer)
+		+ nkpod->wallclock_offset;
 
       unlock_and_exit: