lat_mmap
times how fast a mapping can be made and unmade. This is useful because it
is a fundamental part of processes that use SunOS style shared libraries
(the libraries are mapped in at process start up time and unmapped at
process exit).
The benchmark maps in and unmaps the first size bytes of the file
repeatedly and reports the average time for one mapping/unmapping.
The size
specification may end with ``k'' or ``m'' to mean
kilobytes (* 1024) or megabytes (* 1024 * 1024).
OUTPUT
Output format is "%0.2f %d\n", megabytes, usecs, i.e.,
8.00 1200
ACKNOWLEDGEMENT
Funding for the development of
this tool was provided by Sun Microsystems Computer Corporation.