lat_pipe man page on DragonFly

lat_pipe man page on DragonFly

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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
       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 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)

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