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.
> I'm using the xenomai 2.4 branch and kernel linux-126.96.36.199 patched
> with adeos-ipipe-188.8.131.52-x86-2.2-07.
> Xenomai-help mailing list
Xenomai-core mailing list