Yes, but to set expectations before we even implement the server statistics capture we have planned: we want the CPU to be fully utilized for most of these tests. If you barely see the server showing up in top, something is probably going wrong (or you've run into a different limit such as disk or network).

We're testing the maximum number of requests a server can handle per second, so the optimum is for the CPU to be fully utilized. A different test would measure how much CPU is used if I want to serve X requests per second.