Manual Reference Pages - BW_UNIX (8)
bw_unix - UNIX pipe bandwidth
-P <parallelism> ]
-W <warmups> ]
-N <repetitions> ]
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.
size specification may end with k or m to mean
kilobytes (* 1024) or megabytes (* 1024 * 1024).
Output format is "%0.2f %.2f\n", megabytes, megabytes_per_second, i.e.,
This benchmark should move approximately the reported amount of memory.
Funding for the development of
this tool was provided by Sun Microsystems Computer Corporation.
Carl Staelin and Larry McVoy
Comments, suggestions, and bug reports are always welcome.
|(c)1994-2000 Larry McVoy and Carl Staelin ||BW_UNIX (8) ||$Date$ |
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