[Xenomai-help] Xenomai 2.0.1 - Posix Skin - realtime priorities - what I'm doing wrong?

[Paolo Gai <pj@domain.hid>]

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Dear all,

First of all, I would like to thank Philippe for the long and exaustive 
reply to my previous post about the scheduling example.

I'm now trying the POSIX skin to write a very simple example using 
real-time priorities, RR and FIFO scheduling.

The idea is that a high priority task creates two medium priority tasks 
(that just prints something using printf) and a low priority task (that 
prints a message).  The example is run twice, in one case the medium 
priority tasks have SCHED_FIFO, in another case they have SCHED_RR.

I would expect that in both cases the two medium priority tasks would 
run printing their characters (either in a FIFO order or mixed when 
using RR), and at their end the low priority task would have run 
printing its message.

Instead, both with and without Xenomai, I obtain an output similar to 
the following one.

----------------------------------------------------------
[root@domain.hid xenomai-demos]# ./ex_rr
#####LOW priority thread!!!
...........###########...........############...........###########...........###########............###########...........###########...........############..........########........########........########........########...........##########............############...........###########...........###########...........###########............####################........................########################.........................########################........................#########################.........................########################......................############..#LOW 
priority thread!!!
.......########........########.........#########.......########........########.........#########.......#######........########........#########........########........########.........#########........#######........########.........#########........########.......########.........########........########........########.........#########........................#########################.........................########################.......................######################.................................############################################.......................############[root@domain.hid 
xenomai-demos]#
----------------------------------------------------------

I attach the source code of the example...

Does the behavior I obtain is normal? What I'm doing wrong?

bye

Paolo


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