Explain the ondemand CPUFreq governor parameters in SAMSUNG galaxy S4?

I am trying to understand how does the onDemand CPUFreq governor works. I have a SAMSUNG S4 device and I looked into the following file to see the tuneable parameters of SAMSUNG Glaxy S4 GT-i9505 (Qualcomm chipset). $ cat /sys/devices/system/cpu/cpufreq/ondemand down_differential enable_turbo_mode ignore_nice_load io_is_busy optimal_freq powersave_bias sampling_down_factor sampling_rate sampling_rate_min sync_freq up_threshold up_threshold_any_cpu_load up_threshold_multi_core I tried to understand these parameters, The kernel documentation here: https://www.kernel.org/doc/Documentation/cpu-freq/governors.txt explains Governors and governor parameters, but some of the parameters are not explained in the documentation. Can you please explain or point me to the documentation which I could read and understand all these parameters for a better understanding of dynamic frequency scaling in Android?