[Xenomai-core] Re: [Xenomai-help] rt_task_wait_period() and overruns

[Philippe Gerum <rpm@xenomai.org>]

Philippe Gerum wrote:
> Steven Seeger wrote:
> 
>> All right, all right. I surrender. *waves the white flag*
>>
>> Let's just say that I saw something different from fusion/classic RTAI 
>> and
>> was reporting it as a possible bug incorrectly, all right?
>>
> 
> Right (except that fusion never exhibited the behaviour you described, 
> though). Still, there is an interesting question that remains which you 
> indirectly brought in, and which is the real issue to worry about: does 
> rt_task_wait_period(), as it is now, behave in the best interest of 
> users who happen to use it properly?
> 
> I mean: if the application misses several deadlines because something is 
> going wild in there, wouldn't the recovery procedure be easier if one 
> knows at once how many deadlines have been missed in a raw,

"in a row". Typical froggie English, sorry.

  without
> having to call the RTOS back. IOW, do we want to purge the overrun count 
> after the first notification and make rt_task_wait_period return this 
> count (e.g. ala Chorus/OS's thread pools), or would it be preferable to 
> keep the things the way they are now?
> 
> Breaking the API again is also an issue, albeit we already broke it for 
> a few other calls when working on v2.1 anyway.
> 
> Open question. Something like a poll, actually.
> 


-- 

Philippe.