Re: [ts-7000] Reboot issue with RTAI Application on the 7260

How are you stopping the RTAI application?

I think I recall reading something on
the RTAI board about issuing the stop_rt_timer, for instance, before one
of the rt_task_wait_period in a timer loop for instance... which causes
things to hang.  

Did you write a signal reference to
the SIGTERM signal and write some internal code to shutdown everything
nicely?  How do yo start/stop the server at will from the command
line -- ctrl-C or kill?  They really are not the same if the kill
is handled correctly.

Probably not much help...

 wrote on 04/17/2007 08:02:26
AM:

> Hi all,
> 
> My question is: Do I need to do something special to start/stop RTAI
> applications from an /etc/init.d script?
> 
> Background:
> 
> I am developing an RTAI application that runs under a server that
in
> turn is started/stopped via an /etc/init.d script.  The init.d
script
> starts the server, which then spawns rtai-load to run the RTAI
> application.  
> 
> The RTAI application is similar to the 'latency' and 'display' test
> programs in the latency test suite.  The hard real time part
runs
> every half second to do some DIO operations then report results to
the
> non-real time part via an rt mailbox.  There is a second rt mailbox
> for sending commands to the real time component from the non-real
time
>  side.
> 
> I am having a problem with the reboot sequence.  When I issue
the
> 'reboot' command, about a third of the time the system hangs just
> after the TERM signal is sent to all tasks (literally half of the
> message is printed on the console).  
> 
> Cycling power usually clears the problem, although sometimes there
is
> a similar problem on boot-up: The system will boot as normal, but
hang
> as the RTAI application is started up.
> 
> The init.d scripts works fine from the command line.  I can start/stop
> the server and RTAI application at will without seeing the problem.
> 
> If I modify the server to not start the RTAI application, the reboot
> sequence works just fine.  
> 
> My next test is to have the server actually start the latency test
> suite program instead of the RTAI application and see if the problem
> persists, but before I spend much more time on the issue, thought
I
> would see if anyone has had similar issues.
> 
> 
> Regards,
> 
> jw
> 
> 
> 
> 
>  
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