Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
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 map-
       ping  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 Microsys-
       tems 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)

NAME | SYNOPSIS | DESCRIPTION | OUTPUT | MEMORY UTILIZATION | ACKNOWLEDGEMENT | SEE ALSO | AUTHOR

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=bw_mmap_rd&sektion=8&manpath=FreeBSD+12.1-RELEASE+and+Ports>

home | help