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Linux 5.0.1 Lands Fixes For AMD Zen CPB, MacBook Pro Booting Issue

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  • Linux 5.0.1 Lands Fixes For AMD Zen CPB, MacBook Pro Booting Issue

    Phoronix: Linux 5.0.1 Lands Fixes For AMD Zen CPB, MacBook Pro Booting Issue

    It's been just one week since the debut of the big Linux 5.0 kernel release and today that's been succeeded by Linux 5.0.1 as the first fix-things-up release...

    http://www.phoronix.com/scan.php?pag...5.0.1-Released

  • #2
    Just don't use the performance governor again with Ryzen when trying to benchmark if Core Boost is working better now.
    The performance governor clamps all cores on Ryzen at the max non boost frequency, and prevents boosting selected cores for single core workloads.

    To have have the single core boosts with Ryzen ondemand, schedutil or a custom governor is necessary.

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    • #3
      built for me / #t2sde: https://www.youtube.com/watch?v=sPiCRda15Bk ;-)

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      • #4
        Just finished compiling linux-libre version, about to fire it up right now on a laptop running Debian stretch.

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        • #5
          Originally posted by ObiWan View Post
          Just don't use the performance governor again with Ryzen when trying to benchmark if Core Boost is working better now.
          The performance governor clamps all cores on Ryzen at the max non boost frequency, and prevents boosting selected cores for single core workloads.

          To have have the single core boosts with Ryzen ondemand, schedutil or a custom governor is necessary.
          Michael It would be nice to see if this is true especially with but also without the new CPB patch. I was under the impression that when the performance governor was selected the frequency scaling was handled by Ryzen itself, not the OS - thus the max single core turbo boots were attained. In addition, it would be interesting to see what minimum frame rates in games are like with the various governors post patch (specifically for the performance and default ondemand governors). I remember you tested this a about a year ago and found that the performance governor had better minimum frame rates in games. It would be interesting to see if this has changed due to this patch and all the other Zen optimizations that have been done since you last tested.

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          • #6
            What's the plan for merging amdgpu bulk moves? It's still not in in the upcoming 5.1 code.

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