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Thread: 22.04 Intel Turboboost Issue

  1. #11
    Join Date
    Mar 2011
    19th Hole
    Ubuntu 22.04 Jammy Jellyfish

    Re: 22.04 Intel Turboboost Issue

    I don't know how much help such a deep dive gives to the OP, but I am thankful for the guru insights and find these insights not only fascinating, but very useful.


    You have nothing to lose by implementing MAFoElffen's suggestion—add the described boot parameter to your grub and try it out. Given that you are posting for the first time, here are the step‑by‑step instructions:

    1. Make sure you have a LiveUSB of Ubuntu to recover from in case you make a mistake and render your system unbootable.
    2. Open a terminal, then:
      sudo nano /etc/default/grub
    3. Find the line that reads:
      GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
    4. Edit this to read:
      GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_idle.max_cstate=4"
    5. <Ctrl>+<o> to save the file
    6. <Ctrl>+<x> to exit nano
    7. Write the change to your boot file with:
      sudo update-grub
    8. Reboot

    Let us know how it goes.

  2. #12
    Join Date
    Feb 2011
    Coquitlam, B.C. Canada
    Ubuntu Development Release

    Re: 22.04 Intel Turboboost Issue

    Quote Originally Posted by MAFoElffen View Post

    "Turboboost is dependent on workload, temperatures, & number of active cores. With more cores active the less boost you get, usually dropping to none at all cores active."

    Seems (from all concerned) that TurboBoots is heavily dependent on the power available to the CPU, along with many other factors. (not just one switch)

    I respect your knowledge of testing Kernels for Ubuntu and such. Just saying that there is more involved.
    Yes, all very true. Thanks for clarifying.

    turbostat without the --quiet parameter will list max frequency verses active cores. Example:

    34 * 100.0 = 3400.0 MHz base frequency
    cpu5: MSR_IA32_POWER_CTL: 0x0004005d (C1E auto-promotion: DISabled)
    cpu5: MSR_TURBO_RATIO_LIMIT: 0x23242526
    35 * 100.0 = 3500.0 MHz max turbo 4 active cores
    36 * 100.0 = 3600.0 MHz max turbo 3 active cores
    37 * 100.0 = 3700.0 MHz max turbo 2 active cores
    38 * 100.0 = 3800.0 MHz max turbo 1 active cores
    Last edited by Doug S; February 13th, 2023 at 01:30 AM.
    Any follow-up information on your issue would be appreciated. Please have the courtesy to report back.

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