MPI_ERR_TRUNCATE: в эфире
у меня естьint Намерен вещать с рута (rank==(FIELD=0)).
int winner
if (rank == FIELD) {
winner = something;
}
MPI_Barrier(MPI_COMM_WORLD);
MPI_Bcast(&winner, 1, MPI_INT, FIELD, MPI_COMM_WORLD);
MPI_Barrier(MPI_COMM_WORLD);
if (rank != FIELD) {
cout < rank < " informed that winner is " < winner < endl;
}