After some discussion on the devel list, I opened https://svn.open-mpi.org/trac/ompi/ticket/2904 to track the issue.
On Oct 25, 2011, at 12:08 PM, Ralph Castain wrote: > FWIW: I have tracked this problem down. The fix is a little more complicated > then I'd like, so I'm going to have to ping some other folks to ensure we > concur on the approach before doing something. > > On Oct 25, 2011, at 8:20 AM, Ralph Castain wrote: > >> I still see it failing the test George provided on the trunk. I'm unaware of >> anyone looking further into it, though, as the prior discussion seemed to >> just end. >> >> On Oct 25, 2011, at 7:01 AM, orel wrote: >> >>> Dears, >>> >>> I try from several days to use advanced MPI2 features in the following >>> scenario : >>> >>> 1) a master code A (of size NPA) spawns (MPI_Comm_spawn()) two slave >>> codes B (of size NPB) and C (of size NPC), providing intercomms A-B and >>> A-C ; >>> 2) i create intracomm AB and AC by merging intercomms ; >>> 3) then i create intercomm AB-C by calling MPI_Intercomm_create() by using >>> AC as bridge... >>> >>> MPI_Comm intercommABC; A: MPI_Intercomm_create(intracommAB, 0, >>> intracommAC, NPA, TAG,&intercommABC); >>> B: MPI_Intercomm_create(intracommAB, 0, MPI_COMM_NULL, 0,TAG,&intercommABC); >>> C: MPI_Intercomm_create(intracommC, 0, intracommAC, 0, TAG,&intercommABC); >>> >>> In these calls, A0 and C0 play the role of local leader for AB and C >>> respectively. >>> C0 and A0 play the roles of remote leader in bridge intracomm AC. >>> >>> 3) MPI_Barrier(intercommABC); >>> 4) i merge intercomm AB-C into intracomm ABC$ >>> 5) MPI_Barrier(intracommABC); >>> >>> My BUG: These calls success, but when i try to use intracommABC for a >>> collective communication like MPI_Barrier(), >>> i got the following error : >>> >>> *** An error occurred in MPI_Barrier >>> *** on communicator >>> *** MPI_ERR_INTERN: internal error >>> *** MPI_ERRORS_ARE_FATAL: your MPI job will now abort >>> >>> >>> I try with OpenMPI trunk, 1.5.3, 1.5.4 and Mpich2-1.4.1p1 >>> >>> My code works perfectly if intracomm A, B and C are obtained by >>> MPI_Comm_split() instead of MPI_Comm_spawn() !!!! >>> >>> >>> I found same problem in a previous thread of the OMPI Users mailing list : >>> >>> => http://www.open-mpi.org/community/lists/users/2011/06/16711.php >>> >>> Is that bug/problem is currently under investigation ? :-) >>> >>> i can give detailed code, but the one provided by George Bosilca in this >>> previous thread provides same error... >>> >>> Thank you to help me... >>> >>> -- >>> Aurélien Esnard >>> University Bordeaux 1 / LaBRI / INRIA (France) >>> _______________________________________________ >>> users mailing list >>> us...@open-mpi.org >>> http://www.open-mpi.org/mailman/listinfo.cgi/users >> > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
