On Wed, Sep 11, 2013, at 12:26, Jeff Squyres (jsquyres) wrote: > On Sep 10, 2013, at 2:33 PM, Hugo Gagnon > <opensource.open...@user.fastmail.fm> wrote: > > > I only get the correct output when I use the more "conventional" syntax: > > > > ... > > call MPI_Allreduce(a_loc,a,2,MPI_INTEGER,MPI_SUM,MPI_COMM_WORLD,ierr) > > ... > > What is a_loc? I'm assuming you know it can't be the same buffer as a. > > > However, I get the wrong output when I use MPI_IN_PLACE: > > > > ... > > MPI_Allreduce(MPI_IN_PLACE,a,2,MPI_INTEGER,MPI_SUM,MPI_COMM_WORLD,ierr) > > ... > > This is definitely a puzzle, because I just installed gcc 4.8.1 on my > 10.8.4 OS X MBP,
I also just recompiled gcc 4.8.1_3 from MacPorts, and will recompile openmpi 1.6.5 myself rather than using MacPorts' version. May I ask what are the exact options you passed to ./configure? I'll let you know if that fixes the problem. Thank you. compiled OMPI 1.6.5 from the open-mpi.org web site, and > ran the test program, and I get the correct answers: > > ----- > [6:23] jsquyres-mac:~/mpi ❯❯❯ mpif90 in_place.f90 > [6:23] jsquyres-mac:~/mpi ❯❯❯ mpirun -np 2 ./a.out > 0 4 6 > 1 4 6 > [6:24] jsquyres-mac:~/mpi ❯❯❯ mpirun -np 3 ./a.out > 0 7 10 > 1 7 10 > 2 7 10 > [6:24] jsquyres-mac:~/mpi ❯❯❯ mpirun -np 4 ./a.out > 0 10 14 > 1 10 14 > 2 10 14 > 3 10 14 > [6:24] jsquyres-mac:~/mpi ❯❯❯ mpicc --version > gcc-mp-4.8 (MacPorts gcc48 4.8.1_3) 4.8.1 > Copyright (C) 2013 Free Software Foundation, Inc. > This is free software; see the source for copying conditions. There is > NO > warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR > PURPOSE. > > [6:24] jsquyres-mac:~/mpi ❯❯❯ mpif90 --version > GNU Fortran (MacPorts gcc48 4.8.1_3) 4.8.1 > Copyright (C) 2013 Free Software Foundation, Inc. > > GNU Fortran comes with NO WARRANTY, to the extent permitted by law. > You may redistribute copies of GNU Fortran > under the terms of the GNU General Public License. > For more information about these matters, see the file named COPYING > > [6:24] jsquyres-mac:~/mpi ❯❯❯ > ----- > > Since I'm unable to replicate the problem, can you dig into the OMPI > internals and see what's going wrong (e.g., via gdb or some other > debugger)? > > -- > Jeff Squyres > jsquy...@cisco.com > For corporate legal information go to: > http://www.cisco.com/web/about/doing_business/legal/cri/ > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
