[Boost-users] mpi non-blocking communication

Subject: [Boost-users] mpi non-blocking communication
From: Kraus Philipp (philipp.kraus_at_[hidden])
Date: 2010-11-28 06:54:30

Hello,

I have some problems with the MPI non-blocking communication, but I  
can be a thinking error.
The CPU 0 (rank 0) creates a loop with this:
while (true) {
      std::string l_str;
      p_com.irecv( mpi::any_source, LOGGER_MPI_TAG, l_str );
}

p_com is the commuicator object. All other CPUs (!= 0) can send a  
message to CPU 0, which should be received. The CPUs (!=0) can send a  
message, but they need not, so I would create this with non-blocking  
communication. At this time my l_str is alway empty, so it seems that  
the message, that are send, not transmittet, received or not inserted  
into l_str. I hope the problems is described in a clear way. I would  
like that the CPU 0 can receive message of there are some and all  
other CPUs can send messages.

Thanks

Phil