Re: [Xenomai-help] Timer problems?

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

[-- Attachment #1: Type: text/plain, Size: 2250 bytes --]

Steve Kreyer wrote:
> Hi,
> 
> Ive got a problem using periodic tasks, or timers in generally.
> First of all the relevant piece of source:
> 
> -----------------------------------------------------------------------------------------------------
> 
> #define SLEEP_TIME 100000000
> 
> ...
> 
> static void xmit(void* user_data){
>    int err = 0;
>    unsigned long timeout;
>    err = rt_task_set_periodic(NULL, TM_NOW, SLEEP_TIME);
>    if(err < 0){
>        fprintf(stderr, "Error: Cannot set rt task 'xmit' periodic!
> errcode=%d\n", err);
>        return;
>    }
>    err = rt_task_wait_period(&timeout);
>    if(err < 0)
>        fprintf(stderr, "Warning: Cannot wait for task period! errcode=%d
> timeout=%ld\n", err, timeout);
> }
> ...
> int main(){
>    int err = 0;
>    mlockall(MCL_CURRENT | MCL_FUTURE);
>    signal(SIGINT, cleanup);
>    err = rt_timer_set_mode(TM_ONESHOT);
>    if(err < 0){
>        fprintf(stderr, "Error: Cannot set rt timer mode to TM_ONESHOT!
> errcode=%d\n", err);
>        return 1;
>    }
>    err = rt_task_spawn(&xmit_task, xmit_task_name, 0, XMIT_TASK_PRIO,
> T_FPU, xmit, NULL);
> ...
> }
> -------------------------------------------------------------------------------------------------------------
> 
> 
> The task did not wait for the period to which it is set.
> I get always an ETIMEDOUT error, and a timer overrun of 16 times when I
> try to call rt_task_wait_period...
> Also another problem is, everytime I try to call rt_task_sleep or the
> standard linux library functions pause,sleep or usleep,
> my system does not react on inputs anymore and I have to restart the
> machine...
> Can anyone tell me whats going on there?
> If you need additional informations, please let me know :)
> 

Your example (with slight modifications) works fine, and the other
effect you listed here clearly indicates some fundamental problem of
your box. Does the kernel log contain any suspicious messages,
specifically after that input lock-up? If not, please provide a precise
setup description: Xenomai version, kernel version + ipipe revision,
hardware description (e.g. the architecture), and the .config of your
system (zipped please).

Jan


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