* --verbose flag, see TODO in sourcecode (main.c)
* unit tests, or make check
* switchable low load function, we use usleep now. but we see systems where
  usleep is broken. furthermore, there might be ways to safe even more energy
  in the low load function
* check if using more memory increases the energy consumption (avoid "empty" 
  DIMMS), add parameter to increase memsize if necessary
