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)