Embedded Programming with Modern C++ Cookbook

How to do it...

We are going to use simple shell commands to adjust the parameters of CPU frequency on a Raspberry PI box: 

1. Log in to a Raspberry Pi or another nonvirtualized Linux system.
2. Switch to the root account:

$ sudo bash#

3. Get the current frequency of all CPU cores available in the system:

# cat /sys/devices/system/cpu/*/cpufreq/scaling_cur_freq

4. Get all of the frequencies supported by the CPU:

# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies

5. Get the available CPU-frequency governors:

# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors

6. Now let's check which frequency governor is currently in use:

# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor 

7. Adjust the minimum ...