[ros-users] Ros on Arm Hanging
Daniel Stonier
d.stonier at gmail.com
Mon Jul 12 10:04:33 UTC 2010
On 12 July 2010 17:24, René Wagner <rene.wagner at dfki.de> wrote:
> On Fri, 2010-07-09 at 10:45 +0900, Daniel Stonier wrote:
> > - Patched (using the memcpy's rather than the reinterprets in the
> > SERIALIZER macro).
> > - In signal+warn mode (echo 5 > /proc/cpu/alignment)
> > - (float64&int32) client gives a bus error and kernel outputs an
> > alignment trap message, but servers are fine
> > - In default mode (echo 0 > /proc/cpu/alignment)
> > - (float64&int32) client and server function without hanging like
> before
> >
> > So...its working, but is this the right fix?
>
> You probably want to check where the unaligned memory access is
> happening. Can you run your float_client from within gdb? This should
> allow you to get a backtrace once the kernel has sent the signal (bus
> error) from the alignment trap.
>
> Cheers,
>
> Rene
>
> Getting some more meaningful backtraces now - catch bus errors for both the
float64's and the int32's in some cases, some with, some without that
memcopy patch above. I'll put together some results when I get back to work
in the morning.
> -
> ------------------------------------------------------------
> Dipl.-Inf. René Wagner Junior Researcher
> DFKI Bremen Enrique-Schmidt-Str. 5
> Safe and Secure Cognitive Systems D-28359 Bremen
>
> Phone: (+49) 421-218-64224 Fax: (+49) 421-218-98-64224
> Web: http://www.informatik.uni-bremen.de/agebv/en/ReneWagner
> --- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> Deutsches Forschungszentrum für Künstliche Intelligenz GmbH
> Firmensitz: Trippstadter Strasse 122, D-67663 Kaiserslautern
>
> Geschäftsführung:
> Prof. Dr. Dr. h.c. mult. Wolfgang Wahlster (Vorsitzender)
> Dr. Walter Olthoff
> Vorsitzender des Aufsichtsrats:
> Prof. Dr. h.c. Hans A. Aukes
> Amtsgericht Kaiserslautern HRB 2313
> ------------------------------------------------------------
>
> _______________________________________________
> ros-users mailing list
> ros-users at code.ros.org
> https://code.ros.org/mailman/listinfo/ros-users
>
--
Phone : +82-10-5400-3296 (010-5400-3296)
Home: http://snorriheim.dnsdojo.com/
Yujin Robot: http://www.yujinrobot.com/
Embedded Control Libraries: http://snorriheim.dnsdojo.com/redmine/wiki/ecl
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ros.org/pipermail/ros-users/attachments/20100712/4b4bb2a1/attachment-0003.html>
More information about the ros-users
mailing list