[En-Nut-Discussion] Thread priority

[Rodrigue ROLAND]

Maybe you should use a hardware timer instead...

Michel Hendriks a écrit :
> Thanks for your answer.
>
> So the comment is a guideline at best, not a 'hard' restriction.(?)
>
> The reason I am asking is because I want to service a watchdog in
> a thread and I want to make sure that it gets serviced when there
> is any time to do so. This thread will do nothing else than the 
> watchdog so it CPU usage should be very low.
>
> Greets,
> Michel
>
>   
>> -----Oorspronkelijk bericht-----
>> Van: en-nut-discussion-bounces at egnite.de 
>> [mailto:en-nut-discussion-bounces at egnite.de] Namens Ernst Stippl
>> Verzonden: dinsdag 15 mei 2007 21:53
>> Aan: 'Ethernut User Chat (English)'
>> Onderwerp: Re: [En-Nut-Discussion] Thread priority
>>
>> Hi Michel!
>>
>> This comment was added in version 4.1.9, it did not exists in 
>> 4.1.4 Interestingly, the ocde of NutThreadSetPriority has not 
>> changed (besides 3 "#ifdef NUTDEBUG") I grep'ed for 
>> NutThreadSetPriority (output below) and it canbe seen that 
>> Seems like a "OS versa apps" divide here. Only device driver 
>> threads have prios lower than 32.
>> The important thing is that some quite undesired effects may 
>> occur when interfering with them.
>> Make sure you are giving up the CPU fast enough when running 
>> on such prio!
>>
>> regards
>> ernst
>> -------------------------------------
>>
>> -----Ursprüngliche Nachricht-----
>> Von: en-nut-discussion-bounces at egnite.de
>> [mailto:en-nut-discussion-bounces at egnite.de] Im Auftrag von 
>> Michel Hendriks
>> Gesendet: Dienstag, 15. Mai 2007 13:54
>> An: En-Nut-Discussion at egnite.de
>> Betreff: [En-Nut-Discussion] Thread priority
>>
>> Hi guys, 
>>
>> Can anyone answer me why the comment for the 
>> NutThreadSetPriority() function says that thread priority of 
>> applications are limited to the 32.254 range?
>>
>> The reason I am asking is because e.g. the "rxi5" thread has 
>> a prio of 9 and I would like to create a thread that is 
>> *always* the highest prio.
>> Can I safely ignore the comment and use prio 1, or should I 
>> lower the prio of the rxi5 thread???? 
>>
>> Greets
>> Michel Hendriks 
>>
>>     
>
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