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AMD P-State Guided Autonomous Mode Coming For Linux 6.4

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  • Keith Myers
    replied
    Michael, you said you were going to run some amd_pstate=guided tests in your amd_pstate_epp test article.

    I recently finished up some AMD P-State EPP comparison benchmarks on 4th Gen EPYC and should have those Linux 6.3 benchmarks posted next week. I'll be conducting some AMD P-State Guided Autonomous Mode benchmarks soon as well.
    Did you forget about that? Been waiting for a while now.

    Leave a comment:


  • PAUL007
    replied
    Originally posted by emansom View Post

    There's no risk, it chain loads an EFI program into RAM.

    It doesn't write nor modify the existing UEFI.

    It is as risky as booting from an Ubuntu ISO from USB.
    Thanks Its working , Can I remove usb after boot ?

    only amd_pstate=passive ,active dosen't tried blacklisting acpi-cpufreq
    So my idle frequency has dropped way bellow 1ghz which is more efficient
    top frequency by default showing 4.2ghz to 4.3ghz

    epp driver will not work as it needs pstate active mode ?
    Last edited by PAUL007; 20 March 2023, 04:20 AM.

    Leave a comment:


  • emansom
    replied
    Originally posted by PAUL007 View Post

    too risky got one machine maybe later

    There's no risk, it chain loads an EFI program into RAM.

    It doesn't write nor modify the existing UEFI.

    It is as risky as booting from an Ubuntu ISO from USB.

    Leave a comment:


  • PAUL007
    replied
    Originally posted by stormcrow View Post

    Have some Prep-H and remember at least some kernel commands override firmware settings. (BIOS is long since dead, stop calling UEFI "BIOS"!)
    which commands bios=UEFI ?

    Leave a comment:


  • PAUL007
    replied
    Originally posted by pieman View Post
    what zen are you on? with zen 3 and above, cppc is needed by default. at least on windows to help properly keep a thread on a ccd and be driven by the strongest two cores on that ccd.
    zen2 r7 4800h

    Leave a comment:


  • PAUL007
    replied
    Originally posted by aviallon View Post

    You could enable it using this : https://github.com/DavidS95/Smokeless_UMAF
    too risky got one machine maybe later


    Leave a comment:


  • aviallon
    replied
    Originally posted by Mitch View Post
    Can we expect TLP or auto-cpufreq likely be a good all-in-one tool that takes care of tuning this stuff?

    Would big distros tweak it for us?

    I'm always scratching my head how my laptop gets way worse battery life on Linux than on Windows. The performance is practically the same. It makes me wonder why this is and. How much power efficiency is left on the table.

    I already know video decoding and things like that are behind, but for basic stuff like documents and web browsing, it's jarring the difference in battery sometimes.

    This is for both a Thinkpad T14 G3 AMD and a MacBook Air
    Do you use TLP? You could gain a lot of battery life from it.
    More info here : https://wiki.archlinux.org/title/TLP

    Leave a comment:


  • aviallon
    replied
    Originally posted by PAUL007 View Post
    my amd ass burning watching these p-state news floating cant use the driver cause HP disabled cppc from bios.
    You could enable it using this : https://github.com/DavidS95/Smokeless_UMAF

    Leave a comment:


  • pieman
    replied
    Originally posted by PAUL007 View Post
    my amd ass burning watching these p-state news floating cant use the driver cause HP disabled cppc from bios.
    what zen are you on? with zen 3 and above, cppc is needed by default. at least on windows to help properly keep a thread on a ccd and be driven by the strongest two cores on that ccd.

    Leave a comment:


  • stormcrow
    replied
    Originally posted by PAUL007 View Post
    my amd ass burning watching these p-state news floating cant use the driver cause HP disabled cppc from bios.
    Have some Prep-H and remember at least some kernel commands override firmware settings. (BIOS is long since dead, stop calling UEFI "BIOS"!)

    Leave a comment:

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