I have a code that seems to run about 40% faster when I bond together twin eth interfaces. The question, of course, arises: is it really producing so much traffic to keep twin 1 Gig eth interfaces busy? I don't really believe this but need a way to check.
What are good tools to monitior the MPI performance of a running job. Basically what throughput loads is it imposing on the eth interfaces. Any suggestions? The code does not seem to produce much of disk I/O as profiled via strace (if at all NFS I/O is a bottleneck). -- Rahul
