lat_pipe - measure interprocess communication latency through pipes
[ -P <parallelism>
] [ -W <warmups>
[ -N <repetitions>
uses two processes communicating through a Unix pipe to measure
interprocess communication latencies. The benchmark passes a token back and
forth between the two processes (this sort of benchmark is frequently referred
to as a ``hot potato'' benchmark). No other work is done in the processes.
The reported time is in microseconds per round trip and includes the total time,
i.e., the context switching overhead is includeded. Output format is like so
Pipe latency: 491 microseconds
Funding for the development of this tool was provided by Sun Microsystems
Carl Staelin and Larry McVoy
Comments, suggestions, and bug reports are always welcome.