|
MPI_BARRIER(comm) Global Synchronization within a given communicator
|
|
MPI_BCAST Global Broadcast
|
MPI_GATHER Concatenate data from all processors in a communicator into one process
-
MPI_ALLGATHER puts result of concatenation in all processors
|
|
MPI_SCATTER takes data from one processor and scatters over all processors
|
|
MPI_ALLTOALL sends data from all processes to all other processes
|
MPI_SENDRECV exchanges data between two processors -- often used to implement "shifts"
-
viewed as pure point to point by some
|
