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BW_MMAP_RD(8)                       LMBENCH                      BW_MMAP_RD(8)

NAME
       bw_mmap_rd - time the reading and summing of a file

SYNOPSIS
       bw_mmap_rd [ -P <parallelism> ] [ -W <warmups> ] [ -N <repetitions> ]
       size file

DESCRIPTION
       bw_mmap_rd creates a memory mapping to the file and then reads the
       mapping in an unrolled loop similar to that used in bw_mem_rd(8).  The
       benchmark is intended to be used on a file that is in memory, i.e., the
       benchmark is a reread benchmark.  Other file benchmarking can be done
       with lmdd(8).

       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 Larry McVoy                 $Date$                       BW_MMAP_RD(8)