Sim: Add functionality to the simulation scripts to allow running with
SMARTS sampling methodology.  At the moment the scripts don't support the
full range of options (e.g. you can't start from a checkpoint), and nor do
they check for incompatibility with other options.  However, they do give
an example of how sampling could work with M5.

With a benchmark that has 10 billion dynamic instructions, try:

<m5bin> configs/example/se.py -d --caches --smarts:n 10000 --smarts:b 10