How fast can I read from /proc/stat and still get new information?
Moreover, the ``procs_running'' field is not a average of any sort,
right? It's the number of processes running in that exact instant, so I
should expect it always to be 1 or more (because we're counting the
process reading it). Finally, I don't get the ``steal'' field. What's
involuntary wait time? (which it seems to account for)