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AMD Ryzen "Renoir" CPU Frequency Scaling Governor Performance

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  • AMD Ryzen "Renoir" CPU Frequency Scaling Governor Performance

    Phoronix: AMD Ryzen "Renoir" CPU Frequency Scaling Governor Performance

    With 129 tests carried out while also looking at the CPU power consumption and temperatures during benchmarking, here is a look at how the CPU frequency scaling governor plays a role in the performance of the latest-generation AMD Ryzen 4000 "Renoir" laptops for Linux.

    http://www.phoronix.com/vr.php?view=29408

  • #2
    Interesting results.

    Seems there are really only 2 modes. Powersave and "the rest".

    The differences between all of the non-powersave modes were pretty small and probably fall in the range of error for the tests.

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    • #3
      Wonder if there's a way to get the battery life under each policy.

      Can you switch policy on demand, e.g., if you start a game, you could set the policy to what that game performs best in?

      Is there a Linux equivalent to Radeon Chill - sometimes you don't need the game to hit 100FPS, 60 is fine, and save power for the rest.

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      • #4
        Originally posted by sykobee View Post
        Wonder if there's a way to get the battery life under each policy.

        Can you switch policy on demand, e.g., if you start a game, you could set the policy to what that game performs best in?

        Is there a Linux equivalent to Radeon Chill - sometimes you don't need the game to hit 100FPS, 60 is fine, and save power for the rest.
        Yes. Look into Feral's GameMode.

        The closest thing I can think of to your second question would be libstrangle.

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        • #5
          Wait performance governor used less power than both on-demand and schedutil???

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          • #6
            Typo?

            Originally posted by phoronix View Post
            While the "performance" governor is generally recommended for Linux gamers in leading to the best performance, that is the case specifically when using a discrete graphics card.
            Did you mean "that isn't the case"?

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            • #7
              Originally posted by tildearrow View Post
              Typo?



              Did you mean "that isn't the case"?
              No, powersave for iGPUs (frees power budget for gpu), performance for dGPUs.

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              • #8
                Originally posted by LoveRPi View Post
                Wait performance governor used less power than both on-demand and schedutil???
                As you would expect since this is measuring under full load and frequency changes cost cycles (transition latency). The performance and powersave governors always run a the highest and lowest available frequencies respectively.

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                • #9
                  isn't the default governor since 5.7 "schedutil" not "ondemand"?

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                  • #10
                    Originally posted by leipero View Post
                    isn't the default governor since 5.7 "schedutil" not "ondemand"?
                    No that's only for Intel P-State in HWP mode.
                    Michael Larabel
                    http://www.michaellarabel.com/

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