Provided by: lmbench-doc_3.0-a9-1_all bug

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
       Microsystems 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)