NetPIPE
NetPIPE: "NetPIPE
A Network Protocol Independent Performance Evaluator
Questions/comments/bug-reports should be emailed to netpipe@scl.ameslab.gov If you do not get a response, please subscribe to the Netpipe mailing list and re-post since We've been getting a lot of junk mail on that address.
NetPIPE is a protocol independent performance tool that visually represents the network performance under a variety of conditions. It performs simple ping-pong tests, bouncing messages of increasing size between two processes, whether across a network or within an SMP system. Message sizes are chosen at regular intervals, and with slight perturbations, to provide a complete test of the communication system. Each data point involves many ping-pong tests to provide an accurate timing. Latencies are calculated by dividing the round trip time in half for small messages ( < 64 Bytes ).

NetPIPE was originally developed at the SCL by Quinn Snell, Armin Mikler, John Gustafson, and Guy Helmer. Their IASTED conference paper in postscript or html format, along with the slides in postscript format, provide a basic description of NetPIPE. "
- posted by Gp @ 10:05 PM