On 04/23/2013 06:00 PM, Tom Z wrote:
Hi,

It seems this problem didn't occur before, but yesterday when I ran the same program 
on the same platform, a statement in my program calling rt_task_wait_period() returns 
-11. I looked up the error code, and 11 is the value of EAGAIN defined in <LINUX 
INCLUDE>/asm-generic/error_base.h. So I tried to modify my code like this

unsigned long overrun;

ret = -EAGAIN
while(-EAGAIN == ret)
     ret = rt_task_wait_period( &overrun);


But it keeps spinning and throws an error in the end: CPU time exceeded.



What would be the possible cause? My platform is a Core 2 Duo laptop with 
Xenomai 2.6.2.1 on Linux 3.5.7.



Check the doc for EWOULDBLOCK. rt_task_set_periodic() was not
called for the task.

--
Philippe.

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