mbw(1)							      General Commands Manual							    mbw(1)

NAME

       mbw - Memory BandWidth benchmark

SYNOPSIS

       mbw [options] arraysize_in_MiB

DESCRIPTION

       mbw determines available memory bandwidth by copying large arrays of data in memory.

OPTIONS

       -q     Quiet; suppress informational messages.

       -a     Suppress printing the average of each test.

       -n <number>
	      Select number of loops per test

       -t <number>
	      Select  tests  to  be  run.  If no -t parameters are given the default is to run all tests. -t0: memcpy() test, -t1: dumb (b[i]=a[i]
	      style) test, -t2: memcpy() with arbitrary block size

       -b <bytes>
	      Block size in bytes for -t2.

       -h     Show quick help.

USAGE

       mbw will allocate two arraysize arrays in memory and copy one to the other.  Reported 'bandwidth' is the amount of  data  copied  over  the
       time this operation took.

       Obviously  mbw  needs twice arraysize MiBytes (1024*1024 bytes) of physical memory - you'd better switch off swap or otherwise make sure no
       paging occurs. Needless to say that it should not be run on a busy system.

TODO

       Multiple thread support.  Better configurability, including using getopt() for parsing arguments.

AUTHOR

       andras.horvath@gmail.com

memory bandwidth benchmark					   Apr 26, 2006 							    mbw(1)