On Jan 31, 2012, at 11:16 AM, adrian sabou wrote: > Like I said, a very simple program. > When launching this application with SLURM (using "salloc -N2 mpirun > ./<my_app>"), it hangs at the barrier.
Are you able to run the MPI example programs in examples/ ? > However, it passes the barrier if I launch it without SLURM (using "mpirun > -np 2 ./<my_app>"). I first noticed this problem when my application hanged > if I tried to send two successive messages from a process to another. Only > the first MPI_Send would work. The second MPI_Send would block indefinitely. > I was wondering whether any of you have encountered a similar problem, or may > have an ideea as to what is causing the Send/Receive pair to block when using > SLURM. The exact output in my console is as follows: > > salloc: Granted job allocation 1138 > Process 0 - Sending... > Process 1 - Receiving... > Process 1 - Received. > Process 1 - Barrier reached. > Process 0 - Sent. > Process 0 - Barrier reached. > (it just hangs here) > > I am new to MPI programming and to OpenMPI and would greatly appreciate any > help. My OpenMPI version is 1.4.4 (although I have also tried it on 1.5.4), > my SLURM version is 0.3.3-1 (slurm-llnl 2.1.0-1), I'm not sure what SLURM version that is -- my "srun --version" shows 2.2.4. 0.3.3 would be pretty ancient, no? -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
