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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 mea-
       sure interprocess communication latencies.  The benchmark passes	a  to-
       ken 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 Microsys-
       tems 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)

NAME | SYNOPSIS | DESCRIPTION | OUTPUT | ACKNOWLEDGEMENT | SEE ALSO | AUTHOR

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