Embedded Programming with Modern C++ Cookbook

How it works...

PowerTOP is a tool created by Intel to diagnose power issues in a Linux system. It is part of the Raspbian distribution and can be installed using the apt-get command:

# apt-get install powertop

When we run it without parameters, it starts in an interactive mode and lists all of the processes and kernel tasks, ordered by their power usage and the frequency of the events they generate. As we discussed in the Using events for waiting recipe, the more often a program has to wake up the processor, the less energy efficient it is:

Using the Tab key, we can switch to other reporting modes. For example, Device stats shows how much  ...