DragonFly On-Line Manual Pages

LAT_PIPE(8)                         LMBENCH                        LAT_PIPE(8)

NAME
       lat_pipe - measure interprocess communication latency through pipes

SYNOPSIS
       lat_pipe [ -P <parallelism> ] [ -W <warmups> ] [ -N <repetitions> ]

DESCRIPTION
       lat_pipe uses two processes communicating through a Unix pipe to
       measure interprocess communication latencies.  The benchmark passes a
       token 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

       Pipe latency: 491 microseconds

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

SEE ALSO
       lmbench(8).

AUTHOR
       Carl Staelin and Larry McVoy

       Comments, suggestions, and bug reports are always welcome.

(c)1994 Larry McVoy                 $Date$                         LAT_PIPE(8)