LinkTest: Parallel MPI PingPong Test-> version 1.2p1 now available (see Release notes)
The Linktest program is a parallel ping-pong test between all possible MPI connections of a machine. Output of this program is a full communication matrix which shows the bandwidth and message latency between each processor pair and a report including the minimum bandwidth. The linktest runs for n processors in n steps where in each step n/2 pairs of processors will perform the MPI pingpong test (e.g. 3 iterations, 128 kB messages). The selection of the pairs is random but after running all steps all possible pairs are covered. SIONlib.