lat_unix - measure interprocess communication latency via UNIX sockets
lat_unix [ -m <message size> ] [ -P <parallelism> ] [ -W <warmups> ] [
-N <repetitions> ]
lat_unix 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 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 Computer Corporation.
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.
(c)1994-2000 Carl Staelin and Larry $Date$