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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)