On 2013-04-22 19:50, Kai Bollue wrote:
> Hello,
>
> after having used Xenomai with RTnet for quite some time, we switched to
> new hardware and now experience sporadic freezes when communicating over
> RTnet. (To trigger the problem, it is sufficient to call rtping in a
> loop.) After several minutes (up to about an hour), the system stops
> responding. Output over a serial console while this happens is
>
Does sysrq still work then? sysrq-l would be interesting e.g.
> - Either nothing at all, or
>
> -
> [ 481.189349] INFO: rcu_bh detected stalls on CPUs/tasks: { 2}
> (detected by 0, t=60042 jiffies)
> [ 481.291572] INFO: Stall ended before state dump start
> [ 541.224383] INFO: rcu_preempt detected stalls on CPUs/tasks: { 2}
> (detected by 0, t=60002 jiffies)
> [ 541.331818] INFO: Stall ended before state dump start
> (repeated), or
>
> -
> [ 2333.757994] Xenomai: Unbalanced lock/unlock
Ah, here's where the problem start.
CONFIG_IPIPE_TRACE_PANIC may provide further information. Enable it via
the I-pipe tracer. Then, before triggering the lockup, increase the
backtrace points to, say, 2000:
echo 2000 > /proc/ipipe/trace/back_trace_points
Jan
--
Siemens AG, Corporate Technology, CT RTC ITP SDP-DE
Corporate Competence Center Embedded Linux
_______________________________________________
Xenomai mailing list
[email protected]
http://www.xenomai.org/mailman/listinfo/xenomai
