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LAT_UNIX(8)                         LMBENCH                        LAT_UNIX(8)


NAME

       lat_unix - measure interprocess communication latency via UNIX sockets


SYNOPSIS

       lat_unix [ -m <message size> ] [ -P <parallelism> ] [ -W <warmups> ] [
       -N <repetitions> ]


DESCRIPTION

       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 processes.


OUTPUT

       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


ACKNOWLEDGEMENT

       Funding for the development of this tool was provided by Sun
       Microsystems Computer Corporation.


SEE ALSO

       lmbench(8), lat_fcntl(8), lat_fifo(8), lat_tcp(8), lat_udp(8).


AUTHOR

       Carl Staelin and Larry McVoy

       Comments, suggestions, and bug reports are always welcome.

(c)1994-2000 Carl Staelin and Larry McVoy
                                    $Date$                         LAT_UNIX(8)

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