Hi, Jeffrey, The example in mpi4py manual can not run correctly with more than 16 processes. So I have a reason to believe mpi4py library is not calling MPI correctly. It would be more appropriate to ask mpi4py developers to support their manual example to run more than 16 processes first. — Huiwei On Mar 11, 2014, at 8:40 PM, Jeffrey Larson <[email protected]> wrote:

I was using the example from the mpi4py manual: http://mpi4py.scipy.org/docs/mpi4py.pdf (See the lines directly below "Worker (or child, or server) side:" in Section 4.3: Dynamic Process Management)