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I have installed openmpi-1.2.3. My system has two ethernet ports. Thus, I am trying to make use of both ports to speed up the communication process by using openmp to split into two threads. However, this implementation always cause error. Then I realized that I need to build openmpi using --enable-mpi-threads and use MPI_Init_thread to initialize. But, the initialization always return MPI_THREAD_SINGLE no matter what value I set. Using ompi_info|grep Thread, it shows that thread support has already been activated. Thus, I seek your help to teach me what other configurations I need to set in order to use multi-threads and what are the parameters to include in mpirun in order to use the two ethernet ports.
Thank you very much.
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