lat_unix - measure interprocess communication latency via UNIX sockets
[ -m <message size>
] [ -P
] [ -W <warmups>
] [ -N
is a client/server program that measures interprocess
communication latencies. The benchmark passes a message 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
AF_UNIX sock stream latency: 700 microseconds
Funding for the development of this tool was provided by Sun Microsystems
lmbench(8), lat_fcntl(8), lat_fifo(8), lat_tcp(8), lat_udp(8).
Carl Staelin and Larry McVoy
Comments, suggestions, and bug reports are always welcome.