Hi Philipp,
On Mon, Nov 29, 2010 at 4:17 PM, Philipp Kraus
At this time I have two problems. Sometimes the programm create a error with: Adress not mapped (it seems that the iprobe creates the problem). I can't reproduce the error.
It's difficult to give any sensible advice on this without compilable code; the general advice is to try to create a minimal test source that can reproduce the problem. In doing the exercise, I often found out the problem myself... A rough guess about your "address not mapped" error: if you are going to use MPI with threads, then *two* conditions must be met: (1) You must initialize MPI with MPI_Init_thread() instead of MPI_Init(). The boost::mpi::communicator ctor uses MPI_Init(), so you must run the initialization yourself and *then* create the communicator object. For instance:: MPI_Init_thread(&argc, &argv, MPI_THREAD_SERIALIZED) // ... mpi::communicator world; (2) Your MPI library must have been compiled with threads support. This is not the case with some Linux distributions, e.g., Rocks 5.x, so double-check that MPI_Init_threads() actually did its job.
Another problem is, that I don't received all messages, the messages are send with isend command. I have try to create a loop with iprobe in my shutdown method to get the rest of the messages, but that doesn't work well.
For each sent message, you must either recv() it or cancel() it. Maybe you can build into your program some kind of control logic so that the logger knows when the last message has arrived and can then shutdown? For instance, in a code of mine, I have "worker" ranks send an "end of transmission" message when they are going out of the main loop; when all ranks have sent the "end of transmission" message, it is safe to call MPI_Finalize. Hope this helps, Riccardo