Classification: UNCLASSIFIED Caveats: NONE If I could venture a guess, it sounds like you are trying to merge two separate programs into one executable and run them in parallel via MPI.
The problem sounds like an issue where your program starts in parallel but then changes back to serial while the program is still executing. I can't be entirely sure without looking at the code itself. One guess is that MPI_Finalize is in the wrong location. Finalize should be called to end the parallel section and move the program back to serial. Typically this means that Finalize will be very close to the last line of the program. It may also be possible that with the way your program is structured, the effect is effectively serial since only one core is processing at any given moment. This may be due to extensive use of barrier or similar functions. Andrew Burns Lockheed Martin Software Engineer 410-306-0409 ARL DSRC andrew.j.bur...@us.army.mil andrew.j.burns35....@mail.mil -----Original Message----- From: users [mailto:users-boun...@open-mpi.org] On Behalf Of Ralph Castain Sent: Tuesday, February 03, 2015 9:05 AM To: Open MPI Users Subject: Re: [OMPI users] prob in running two mpi merged program I'm afraid I don't quite understand what you are saying, so let's see if I can clarify. You have two fortran MPI programs. You start one using "mpiexec". You then start the other one as a singleton - i.e., you just run "myapp" without using mpiexec. The two apps are attempting to execute an MPI_Connect/accept so they can "join". Is that correct? You mention MPICH in your statement about one of the procs - are you using MPICH or Open MPI? If the latter, which version are you using? Ralph On Mon, Feb 2, 2015 at 11:35 PM, Muhammad Ashfaqur Rahman <ashfaq...@gmail.com> wrote: Dear All, Take my greetings. I am new in mpi usage. I have problems in parallel run, when two fortran mpi programs are merged to one executable. If these two are separate, then they are running parallel. One program has used spmd and another one has used mpich header directly. Other issue is that while trying to run the above mentioned merged program in mpi, it's first started with separate parallel instances of same step and then after some steps it becomes serial. Please help me in this regards Ashfaq Ph.D Student Dept. of Meteorology _______________________________________________ users mailing list us...@open-mpi.org Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users Link to this post: http://www.open-mpi.org/community/lists/users/2015/02/26264.php Classification: UNCLASSIFIED Caveats: NONE
smime.p7s
Description: S/MIME cryptographic signature
