bionic (8) lat_pipe.8.gz

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)