Provided by: lmbench-doc_3.0-a7-1_all bug

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
       communication 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
       Microsystems 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)