I am running several EC2 instances, and I want to know the exact work my CPU is doing. On "normal" machines I am doing this with munin and its CPU plugin which looks at the statistics provided by /proc/stat.
On my EC2 machines however, I get incorrect graphs. The machine has two cores, so the max CPU usage should be 200% - however it gets as high as 400%:
I know that I should use Amazon CloudWatch to see the total CPU usage (and this is the official and recommended from Amazon way to do this), but I am specifically looking on how the CPU usage is spend (e.g. system, user, iowait).
Is there a way to get detailed CPU usage statistics on EC2 instances?