[gmx-developers] Debugging MPI problems?

Marc Baaden baaden at smplinux.de
Mon Oct 1 23:13:21 CEST 2007


thanks to Axel and David for their debugging tips.
It was actually a problem related to the printf
statement as indicated by David.

The weird thing is that this should have gone wrong
on AIX, too. But well, the bug is solved at least.


akohlmey at cmm.chem.upenn.edu said:
>> marc,
>> what you describe looks a lot like you have a mismatch  in integer
>> data types. on a big endian machine that is harmless, because you may
>> only need to read the lower half of the data, but on the little
>> endians, you may  violate access boundarie restrictions.

>> you should try to enforce a core dump and have a closer look through
>> the stack frames.

>> cheers,
>>    axel. 

spoel at xray.bmc.uu.se said:
>> your problem is most likely in the fprintf. If you compile with -g
>> this  stack dump will also include a line number. 

 Dr. Marc Baaden  - Institut de Biologie Physico-Chimique, Paris
 mailto:baaden at smplinux.de      -      http://www.baaden.ibpc.fr
 FAX: +33 15841 5026  -  Tel: +33 15841 5176  ou  +33 609 843217

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