did a quick check for a 1.5.2 build I have lying around (on an Ubuntu box):
$ nm libmpi.so | grep MPIR_Breakpoint
00000000000537bf T MPIR_Breakpoint
Dominik
On 03/22/2011 03:35 PM, Jeff Squyres wrote:
Huh. We hadn't had any reports of DDT issues.
Is it failing because MPIR_Breakpoint is physically not present in the library?
On Mar 21, 2011, at 2:50 PM, Dominik Goeddeke wrote:
Hi,
for what it's worth: Same thing happens with DDT. OpenMPI 1.2.x runs fine, later versions
(at least 1.4.x and newer) let DDT bail out with "Could not break at function
MPIR_Breakpoint".
DDT has something like "OpenMPI (compatibility mode)" in its session launch dialog, with
this setting (instead of the default "OpenMPI") it works flawlessly.
Dominik
On 03/21/2011 06:22 PM, Ralph Castain wrote:
Ick - appears that got dropped a long time ago. I'll add it back in and post a
CMR for 1.4 and 1.5 series.
Thanks!
Ralph
On Mar 21, 2011, at 11:08 AM, David Turner wrote:
Hi,
About a month ago, this topic was discussed with no real resolution:
http://www.open-mpi.org/community/lists/users/2011/02/15538.php
We noticed the same problem (TV does not display the user's MAIN
routine upon initial startup), and contacted the TV developers.
They suggested a simple OMPI code modification, which we implemented
and tested; it seems to work fine. Hopefully, this capability
can be restored in future releases.
Here is the body of our communication with the TV developers:
----------------------------------------------------------------------
Interestingly enough, someone else asked this very same question recently and I
finally dug into it last week and figured out what was going on. TotalView
publishes a public interface which allows any MPI implementor to set things up
so that it should work fairly seamless with TotalView. I found that one of the
defines in the interface is
MPIR_force_to_main
and when we find this symbol defined in mpirun (or orterun in Open MPI's case)
then we spend a bit more effort to focus the source pane on the main routine.
As you may guess, this is NOT being defined in OpenMPI 1.4.2. It was being
defined in the 1.2.x builds though, in a routine called totalview.c. OpenMPI
has been re-worked significantly since then, and totalview.c has been replaced
by debuggers.c in orte/tools/orterun. About line 130 to 140 (depending on any
changes since my look at the 1.4.1 sources) you should find a number of MPIR_
symbols being defined.
struct MPIR_PROCDESC *MPIR_proctable = NULL;
int MPIR_proctable_size = 0;
int MPIR_being_debugged = 0;
volatile int MPIR_debug_state = 0;
volatile int MPIR_i_am_starter = 0;
volatile int MPIR_partial_attach_ok = 1;
I believe you should be able to insert the line:
int MPIR_force_to_main = 0;
into this section, and then the behavior you are looking for should work after
you rebuild OpenMPI. I haven't yet had the time to do that myself, but that was
all that existed in the 1.2.x sources, and I know those achieved the desired
effect. It's quite possible that someone realized the symbol was initialized,
but wasn't be used anyplace, so they just removed it. Without realizing we were
looking for it in the debugger. When I pointed this out to the other user, he
said he would try it out and pass it on to the Open MPI group. I just checked
on that thread, and didn't see any update, so I passed on the info myself.
----------------------------------------------------------------------
--
Best regards,
David Turner
User Services Group email: dptur...@lbl.gov
NERSC Division phone: (510) 486-4027
Lawrence Berkeley Lab fax: (510) 486-4316
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_______________________________________________
users mailing list
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http://www.open-mpi.org/mailman/listinfo.cgi/users
--
Dr. Dominik Göddeke
Institut für Angewandte Mathematik
Technische Universität Dortmund
http://www.mathematik.tu-dortmund.de/~goeddeke
Tel. +49-(0)231-755-7218 Fax +49-(0)231-755-5933
_______________________________________________
users mailing list
us...@open-mpi.org
http://www.open-mpi.org/mailman/listinfo.cgi/users
--
Dr. Dominik Göddeke
Institut für Angewandte Mathematik
Technische Universität Dortmund
http://www.mathematik.tu-dortmund.de/~goeddeke
Tel. +49-(0)231-755-7218 Fax +49-(0)231-755-5933
