MPI_Barrier

--- Blocks until all process have reached this routine.

Input Parameters

comm: communicator (handle)

Notes

Blocks the caller until all group members have called it; the call returns at any process only after all group members have entered the call.

Algorithm

A tree-like or combine algorithm is used to broadcast a message to all members of the communicator. We can modifiy this to use "blocks" at a later time (see MPI_Bcast).

Synopsis


#include "mpi.h"
int MPI_Barrier ( comm )
MPI_Comm comm;

Location: barrier.c