On Jul 17, 2010, at 4:13 AM, Anton Shterenlikht wrote: > Sorry, just to be absolutely clear, are you saying > that even though only one process in the communicator > is calling Bcast, the call will be made on all > processes?
MPI does not magically cause all processes to call MPI_Bcast behind the scenes for you. You must ensure that every process in the communicator explicitly invokes MPI_Bcast. You can do whatever logic you want (to include "if" blocks, etc.) as long as they all call MPI_Bcast. To be clear: all MPI collective operations must be explicitly invoked by every process in the target communicator. -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
