Oops -- somehow we missed this email. Thanks for the bug report! I've filed https://svn.open-mpi.org/trac/ompi/ticket/2981 for it.
On Jan 16, 2012, at 12:36 AM, Y.MATSUMOTO wrote: > Dear All, > > Next feed back is about MPI_Gather problem. > > Gather may be truncated in following condition: > 1:ompi_coll_tuned_gather_intra_linear_sync is called. > (message size is over 6000B) > > 2:Either send data type or recv data type is derived type and > other data type is predefined data type. > > Truncated is occurred by attached C file(following output). > > Output: > *** An error occurred in MPI_Gather > *** on communicator MPI_COMM_WORLD > *** MPI_ERR_TRUNCATE: message truncated > *** MPI_ERRORS_ARE_FATAL (your MPI job will now abort) > > In this C program, > "first_segment_count(variable in ompi_coll_tuned_gather_intra_linear_sync)" > is > different between root and non-root. > That makes messages truncated. > "first_segment_size" can not be dividable by derived data type's size, > but can dividable by predefined data type's size. > But we don't solve this problem. > So, we don't choose linear_sync in coll_tuned_decision_fixed.c. > > Best Regards, > > Yuki MATSUMOTO > MPI development team, > Fujitsu > > <gather.c>_______________________________________________ > devel mailing list > de...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/devel -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
