Changes between Initial Version and Version 1 of mpich/MPI_Barrier

Timestamp:

Jul 23, 2008, 11:39:52 AM (17 years ago)

Author:

wade

Comment:

--

mpich/MPI_Barrier

@@ +1 @@
+= MPI_Barrier =
+Blocks until all process have reached this routine.
+
+= Synopsis =
+{{{
+#include "mpi.h"
+int MPI_Barrier (MPI_Comm comm )
+}}}
+
+= 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 =
+If the underlying device cannot do better, a tree-like or combine algorithm is used to broadcast a message wto all members of the communicator. We can modifiy this to use "blocks" at a later time (see MPI_Bcast).