lat_udp man page on DragonFly

lat_udp man page on DragonFly

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LAT_UDP(8)			    LMBENCH			    LAT_UDP(8)

NAME
       lat_udp - measure interprocess communication latency via UDP/IP

SYNOPSIS
       lat_udp -s
       lat_udp	[  -m <message size> ] [ -P <parallelism> ] [ -W <warmups> ] [
       -N <repetitions> ] hostname
       lat_udp -S hostname

DESCRIPTION
       lat_udp is a client/server program that measures interprocess  communi‐
       cation  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.

       lat_udp has three forms of  usage:  as  a  server  (-s),	 as  a	client
       (lat_udp localhost), and as a shutdown (lat_udp -S localhost).

OUTPUT
       The  reported  time  is in microseconds per round trip and includes the
       total time, i.e., the context switching overhead is  included.	Output
       format is like so

       UDP latency using localhost: 650 microseconds

ACKNOWLEDGEMENT
       Funding	for the development of this tool was provided by Sun Microsys‐
       tems Computer Corporation.

SEE ALSO
       lmbench(8), lat_fcntl(8), lat_fifo(8), lat_tcp(8), lat_unix(8).

AUTHOR
       Carl Staelin and Larry McVoy

       Comments, suggestions, and bug reports are always welcome.

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

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