[Xenomai] latency test

[Xenomai] latency test

[kidd]

Hi
    I post Adeos+xenomai to S3C6410 SOC with Linux-2.6.35.9, and the Linux
kernel and Xenomai are ok when system boot(according the printed
information when system boot)
   when I input "xeno latency", the information in screen is

   == Sampling period: 1000 us
   == Test mode: periodic user-mode task
   == All results in microseconds
   Xenomai: registered exported object dispsem-832 (semaphores)
   warming up...


Then the system is hang (ctrl + C does not work). Through print debug
information in code ,I guess the problem is in "display(in
latency.c)->rt_sem_p"

Can somebody help me to analyse the problem? Thanks

Re: [Xenomai] latency test

[Gilles Chanteperdrix]

On 04/18/2013 10:48 AM, kidd wrote:

> Hi
>     I post Adeos+xenomai to S3C6410 SOC with Linux-2.6.35.9, and the Linux
> kernel and Xenomai are ok when system boot(according the printed
> information when system boot)
>    when I input "xeno latency", the information in screen is
> 
>    == Sampling period: 1000 us
>    == Test mode: periodic user-mode task
>    == All results in microseconds
>    Xenomai: registered exported object dispsem-832 (semaphores)
>    warming up...
> 
> 
> Then the system is hang (ctrl + C does not work). Through print debug
> information in code ,I guess the problem is in "display(in
> latency.c)->rt_sem_p"
> 
> Can somebody help me to analyse the problem? Thanks


If you are porting xenomai to S3C6410, you should have a look at the
I-pipe porting guide:
http://xenomai.org/index.php/I-pipe-core:ArmPorting

the fact that the display task waits for the semaphore is probably not
the problem at all.

-- 
                                                                Gilles.