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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 $Date$                         LAT_UNIX(8)