Dear Jeff I want to send an integer vector of size 4000.It is a very confusing problem.
--- Jeff Squyres <jsquy...@cisco.com> wrote: > If you're seeing the same error from 2 entirely > different MPI > implementations, it is possible that it is an error > in your code. > > Ensure that all processes are calling MPI_Bcast with > the same > arguments (e.g., count, datatype, root, etc.), even > on that 4000th > iteration. > > How big are the blocks that you are sending around? > > > On Dec 5, 2007, at 4:08 AM, alireza ghahremanian > wrote: > > > Dear Friends, > > > > I am writing a matrix multiplication program with > MPI. MPI_Bcast does > > not broadcast to all processes, in last iteration > for block size > > greater than a specific size. I test it with both > MPICH and OPENMPI.I > > have 12 processes which 7 of them are reached to > MPI_Bcast but when > > master (rank 0) send only 6 of them receive the > broadcast (exactly > > from > > rank 1 to 6) and rank 7 stays in waiting. > Surprisingly this happen > > only > > in iteration 3999 from 4000 and in the rest of > cases every thing is > > all > > right, also if I reduce the block size, which, > will be sent, every > > thing will be done correctly. > > > > > > > > > > > ____________________________________________________________________________________ > > Looking for last minute shopping deals? > > Find them fast with Yahoo! Search. > http://tools.search.yahoo.com/newsearch/category.php?category=shopping > > _______________________________________________ > > users mailing list > > us...@open-mpi.org > > http://www.open-mpi.org/mailman/listinfo.cgi/users > > > -- > Jeff Squyres > Cisco Systems > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users > ____________________________________________________________________________________ Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping
