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