[OMPI users] MPI one-sided communication questions

2014-04-21 Thread Tobias Burnus
Dear all, I would like to do one-sided communication as implementation of a Fortran coarray library. "MPI provides three synchronization mechanisms: "1. The MPI_WIN_FENCE collective synchronization call supports a simple synchronization pattern that is often used in parallel computations: na

[OMPI users] "OpenIB unable to find any HCAs": Why is this shown on a single SMP machine?

2007-09-19 Thread Tobias Burnus
If I start an MPI job with: mpirun -np 2 the following gets shown: -- [0,1,0]: OpenIB on host tux was unable to find any HCAs. Another transport will be used instead, although this may result in lower performance. --