mpi - How can I know if all child processes have completed after an MPI_Comm_Spawn call ? -
in mpi, if spawn children mpi_comm_spawn, master process performs spawning. children start doing work. how inform master , other parent-level processes children have finished?
consider writing wrapper around binary program. instead of spawning programme directly, spawn instances of wrapper, in turn launch binary, wait finish, , communicate spawner process.
mpi
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