Several models of the Raspberry Pi have emerged since the first Model B and Model A successor. In this chapter, the ARM architecture is introduced along with CPU features supported by your Pi. Then the Linux API (application programming interface) for managing CPU in your application will be covered (threads).
/proc/cpuinfo
Raspbian Linux provides a nice character device at /proc/cpuinfo, to list information about your CPU. A sample was provided in Listing 6-1 taken from a Raspberry Pi 3 Model B+. You don’t need root access to read this information.
$ cat /proc/cpuinfo
processor : 0
model name : ...
