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BW_UNIX(8)			    LMBENCH			    BW_UNIX(8)

NAME
       bw_unix - UNIX pipe bandwidth

SYNOPSIS
       bw_unix [ -P _parallelism_ ] [ -W _warmups_ ] [ -N _repetitions_	] size

DESCRIPTION
       bw_unix	creates	 a  pipe and forks a child process which keeps writing
       data to the pipe	as fast	as it can.  The	benchmark  measures  how  fast
       the parent process can read the data in size-byte chunks	from the pipe.
       Nothing is done with the	data in	either the parent  (reader)  or	 child
       (writer)	processes.

       The size	specification may end with ``k'' or ``m'' to mean kilobytes (*
       1024) or	megabytes (* 1024 * 1024).

OUTPUT
       Output format is	"%0.2f %.2f\n",	megabytes, megabytes_per_second, i.e.,

       8.00 25.33

MEMORY UTILIZATION
       This benchmark should move approximately	the reported amount of memory.

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)1994-2000 Larry McVoy and Carl St$Date$			    BW_UNIX(8)

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

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