A more up-to-date version of this can be found here: https://www.youtube.com/watch?v=5UT41VsGTsg
Video of the lecture to go along with Learning gem5, Part 1.
http://learning.gem5.org/book/part1/index.html
See https://www.youtube.com/watch?v=c9GJMwwYqmw for Part 2
