Wong Sheng Chao wrote:
> Hi
>
> I'm a newbie in real time programming and I recently came to know of
> Xenomai. After patching the Xenomai to the linux kernel, I ran some
> examples that I found from the Internet to get a better understanding of
> the periodic task. Everything seems to run fine when I start two tasks
> with period of 1s and 2s, but the system freezes when I added more tasks
> ( more than 2 tasks). The period is at 1s, 2s and 3s so i think the
> processor has more than enough time to process the tasks.
>
> I also read that the periodic mode is emulated by a software driver
> which uses one-shot mode programming. Thus i did not enable periodic
> timing when I compile the Linux kernel, is this the cause of the problem?
>
> I'm using a system with Core i7, ubuntu 10.04, linux kernel 2.6.32.15,
> xenomai 2.5.4
>
> Do let me know what I did wrong in the code, thanks in advance!!
>
>
> void demo (void *arg)
> {
> //take in argument
> int num = (int *)arg;
>
> RT_TASK *curtask;
> RT_TASK_INFO curtaskinfo;
>
> curtask=rt_task_self();
> rt_task_inquire(curtask,&curtaskinfo);
>
> // task period in seconds
> rt_task_set_periodic(NULL, TM_NOW, (1000000000 * num));
Should be 1000000000ULL * num here.
--
Gilles.
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