What's the Difference Between Average and Average?

The book is centered somewhat around what you call the four fundamental compute resources against the hardware resources, which are cpu, memory, disk and network. And then you add locks and maybe cus as critical software resources. Before we dive into these, there's the utility you discuss in the book, which is available on your gethub sight, called k trace. Can you tell me a little bit about what prompted you to write this utility? When did you have the idea for it, and just kind of how did it get developed?