[Xenomai-help] rt_task_set_periodic

[Ramon <ramoncostacastello@domain.hid>]

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Hi,

I'm beginning to work with periodical task in xenomai. Currently I'm 
using rt_task_set_periodic.

The third parameter RTIME period allows to specify the period in  clock 
ticks (taken from : 
http://www.xenomai.org/documentation/xenomai-2.5/html/api/group__task.html).

I would like to know how can I get information from the clock tick 
(which is the value? , can be changed ?) ?

Why Is the minimum period I can use in user space ? (experimentally it 
seems to be 0.1ms in my system)
Working in kernel space this period is lower ?


When using the POSIX skin
int pthread_make_periodic_np    (    pthread_t     thread,struct 
timespec *     starttp,struct timespec *     periodtp    )
the resolution is the same ? (performance will be the same ?)

Is there any simple approach to develop a periodic task using the POSIX 
     commands (pthread_cond_timedwait 
<group__posix__cond.html#gfc43955fc3f1cb43723a9e0be19d0ad1> ?) ?



Thank you in advance
Ramon

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