Is there a limit on how many MPI processes can run on a single host? I have a user trying to test his code on the command-line on a single host before running it on our cluster like so:
mpirun -np X foo When he tries to run it on large number of process (X = 256, 512), the program fails, and I can reproduce this with a simple "Hello, World" program: $ mpirun -np 256 mpihello mpirun noticed that job rank 0 with PID 0 on node juno.sns.ias.edu exited on signal 15 (Terminated). 252 additional processes aborted (not shown) I've done some testing and found that X <155 for this program to work. Is this a bug, part of the standard, or design/implementation decision? -- Prentice Bisbal Linux Software Support Specialist/System Administrator School of Natural Sciences Institute for Advanced Study Princeton, NJ
