Philippe Gerum wrote:
> On Wed, 2009-05-13 at 14:04 +0200, Steven Kauffmann wrote:
>> Hi all,
>>
>> If I connect a debugger to my application, other Xenomai periodic
>> threads (threads that not belong to the current process I'm debugging
>> ) are not scheduled anymore. Attached you can find a simple example
>> that reproduces the problem. I run the program 2 times in a different
>> terminal and connected a debugger to one of them. When a breakpoint is
>> reached both programs stops their execution but I would expect that
>> only the program that I'm debugging should stop and not both.
>>
>> $ cat /proc/xenomai/sched
>>
>> CPU  PID    PRI      PERIOD     TIMEOUT    TIMEBASE  STAT       NAME
>>   0  0       -1      0          0          master    R          ROOT
>>   0  5469     0      1000000001 331274938  master    D
>>   0  5471     0      1000000001 0          master    XT
>>
>> This looks normal one thread is stopped ( thread that reaches the
>> breakpoint ) and the other one is delayed because it's a periodic
>> thread. Every time I call this command the timeout of the delayed
>> thread changes so it looks like this thread is still running but in
>> reality it is not.
> 
> This behavior is wanted (I mean, the implementation does freeze all
> thread timers when a break state is reached on purpose), so that you
> don't get tons of overruns once the debuggee is restarted.
> 
> However, I'm now wondering if we should not be a bit smarter than this,
> and narrow the scope of such action. We do have the mechanisms to do so,
> it is just a matter of using them.

Do we? I mean, are we able to know which process a timer belongs to?

-- 
                                                 Gilles.

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