According to Windows's built-in Performance Monitor, I am getting "40" max CPU utilization on my i5-4670 while playing Crusader Kings II. I have no idea whether this means core 0 is at 40% and the rest are unutilized, core 0 is at 100% and core 1 is at 60%, whether each core is at 10%, whether the average of all cores is at 40%, etc. So it's pretty much useless.
Has anyone been able to find a free utility that records this information to a file? Or at least has a graph of the last few minutes so that I can see utilization right after I exit my game? Lavalys EVEREST editions only have 30 day free trials.