Posted in SPJ Technology

What is CPU frequency scaling?

   May 3, 2021  43 Comments on What is CPU frequency scaling?

Read more: http://goo.gl/6wNW2T

There is a feature in Android (via the Linux kernel) which allows the clock frequency of the CPU to be varied. What is it and how does it work?

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43 thoughts on “What is CPU frequency scaling?”

  3. Thank you Mr. Gary for the great videos you always make. They are super informative. Would you please talk a bit more about the difference between dynamic frequency scaling used in ARM processors and SpeedStep used in Intel Atom Z series used in some smartphones such as the zenfones as they are more power hungry. Does it mean Intel failed to deliver good scaling?

  5. I always have this habit of looking someone's eyes when they explain things, I want to know if they look at something behind the camera 😅

  9. Ondemand, by Qualcomm, is generally a good balance between battery and performance for me.
    Interactive is pretty nice, but very battery draining when you are a user with high SOT, like people that use Facebook or Twitter too much.

    Qualcomm does a very good job both on governors and hotplugs.

    Regarding I/O scheduler, I prefer CFQ, but Zen is pretty good.

  12. I've watched soo many videos on this topic
    Even MKBHDs and his made sense but like from a peers perspective.

    This is like a Great Professor teaching you.
    Now I fully understand
    THANX👏👏👏

  15. what? is that how big.little cores work? I'm gonna root my phone and get all cores working at same time and overclock 2x the normal!! 🙂

  21. I switched my S4 to interactive from on-demand (stock setting), and I'm not sure whether it's better or not.

    Also what about setting the idle CPU frequency up slightly from stock? Could that help prevent lag a bit because the CPU no longer has to ramp up through those steps in frequency? I understand the battery life would take a hit.

  26. Man I love your videos Gary! Might not understand half of the things you explain but the half that is understood makes for a great education 🙂 Carry on your great work. Best in class on youtube!

  41. Don't agree that 'OEMs spend millions on this so they know the best'
    Interactive is an average governor at best, there are so many better solutions out there. Also Qualcomm's Mpdecision hotplugging is such an overkill.

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