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)