Dr. Bjarne Stroustrup, designer and implementor of C++ language.
URL: http://www.research.att.com/~bs/homepage.html

One Day One Command
===================

mpstat — Report processor(s) related statistics.

Summary:

The mpstat command writes to standard output activities for each
available processors, processor 0 being the first one. Global average
activities among all processors are also reported.

Examples:

$ mpstat — Show statistics about all processors.

$ mpstat -P 1 — Show the statistics info about processor 1.
                (Note: 0 is 1st, 1 is 2nd, …)

$ mpstat 5 — Show the statistics for every 5 sec.

$ mpstat 5 5 — Show 5 reports of statistics for all processors at 5
              second intervals and calculate the average at the end.

Read: man mpstat