bw_unix - UNIX pipe bandwidth
[ -P <parallelism>
] [ -W <warmups>
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)
specification may end with ``k'' or ``m'' to mean kilobytes (*
1024) or megabytes (* 1024 * 1024).
Output format is "%0.2f %.2f\n", megabytes,
This benchmark should move approximately the reported amount of memory.
Funding for the development of this tool was provided by Sun Microsystems
Carl Staelin and Larry McVoy
Comments, suggestions, and bug reports are always welcome.