The test application ring is located in the directory,
This directory contains some simple user MPI applications.
ring is a generic Cplant MPI test application, sending a token around a logical ring of compute nodes. It can be run on any number of nodes without command line arguments. It links with the puma library, the Cplant MPI library, and the Cplant startup code. ring sends a token around a set of compute nodes (determined by command line parameters to yod) TIMES_AROUND times. For simplicity in running the application, TIMES_AROUND is hardcoded in the source. Upon finishing, ring prints a message about success of the test to standard out
ring can be built by doing ``make'' in the above Cplant directory. The application is run without any arguments.