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Linux 5.17 Will Have An Important Intel P-State Update For Alder Lake Mobile CPUs

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  • Linux 5.17 Will Have An Important Intel P-State Update For Alder Lake Mobile CPUs

    Phoronix: Linux 5.17 Will Have An Important Intel P-State Update For Alder Lake Mobile CPUs

    Linux 5.17 will have a seemingly important fix for upcoming Intel Alder Lake mobile processors. Without this change/fix, you might not see the advertised one-core turbo frequencies being met for your processor depending upon the system and whether tuning your EPP...

    https://www.phoronix.com/scan.php?pa...ate-ADL-Mobile

  • #2
    Given that Alder Lake laptops and Chromebooks should start coming out shortly after CES in 2022 this seems awful late to the party. There is no way that Ubuntu 22.04 LTS and its flavors will pick up Linux 5.17 in time for their April launch. Ubuntu LTS is frequently the OS supported by laptop sellers so it is likely the Linux will perform much worse than Window 11 on the same laptop because of this frequency problem. This doesn't even consider the likes of FreeBSD and OpenBSD who track LTS Linux releases and backport stuff to their kernels from them. They are both unlikely to see this frequency fix any time soon.

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    • #3
      Originally posted by kylew77 View Post
      Given that Alder Lake laptops and Chromebooks should start coming out shortly after CES in 2022 this seems awful late to the party. There is no way that Ubuntu 22.04 LTS and its flavors will pick up Linux 5.17 in time for their April launch. Ubuntu LTS is frequently the OS supported by laptop sellers so it is likely the Linux will perform much worse than Window 11 on the same laptop because of this frequency problem. This doesn't even consider the likes of FreeBSD and OpenBSD who track LTS Linux releases and backport stuff to their kernels from them. They are both unlikely to see this frequency fix any time soon.
      It could be backported.

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      • #4
        It happens with previous architectures, legacy P-State mode could trigger Turbo frequency a bit higher than HWP.

        HWP enabled, you can also toggle EEO, R2H and/or tune PL1, PL2
        Many features which can be set from Linux.

        https://github.com/cyring/CoreFreq

        See that CoreFreq example.
        11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.8. GitHub Gist: instantly share code, notes, and snippets.

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