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Linux 5.10.17 Backports CPUFreq Patches From 5.11 - Benchmarks

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  • Linux 5.10.17 Backports CPUFreq Patches From 5.11 - Benchmarks

    Phoronix: Linux 5.10.17 Backports CPUFreq Patches From 5.11 - Benchmarks

    Released yesterday was the Linux 5.10.17 LTS kernel and what makes this point release a bit more notable than usual is that it backports the CPUFreq patches from 5.11 that were used for addressing the earlier AMD performance regression on Linux 5.11 and often leading to net improvements as well over prior kernel series. The CPUFreq patches were back-ported while the AMD frequency invariance support was not, so what does the performance look like for the Linux 5.10 LTS kernel? Here are some benchmarks...

    http://www.phoronix.com/scan.php?pag...UFreq-Backport

  • #2
    But for most workloads, the Linux 5.10.17 performance was the same as the 5.10.16 kernel
    No regressions?! That's already good enough! Some are faster with the patch.

    Always good to see more testing!

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    • #3
      well, we have good and bad news: I can confirm it improves wall clock time compiling the linux kernel on my 5950x. The bad news: it display random garbage for the cpu frequencies in /proc/cpuinfo :-/ https://youtu.be/--2Xu9WIM1E

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      • #4
        Originally posted by rene View Post
        well, we have good and bad news: I can confirm it improves wall clock time compiling the linux kernel on my 5950x. The bad news: it display random garbage for the cpu frequencies in /proc/cpuinfo :-/ https://youtu.be/--2Xu9WIM1E
        There is already a patch that's been out to deal with the sysfs/cpuinfo inaccuracies, should be in 5.12/5.11/5.10 in the coming days.
        Michael Larabel
        http://www.michaellarabel.com/

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        • #5
          rene

          Just learned a lot of stuff on the command line from watching that video. Nice channel.

          Just wrote a nice little shell script for watching frequencies extrapolating from the video.
          Last edited by creative; 18 February 2021, 06:26 PM.
          Manjaro: R7 5800X, 32GB DDR4 3200, GTX 1070

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          • #6
            Originally posted by rene View Post
            well, we have good and bad news: I can confirm it improves wall clock time compiling the linux kernel on my 5950x. The bad news: it display random garbage for the cpu frequencies in /proc/cpuinfo :-/ https://youtu.be/--2Xu9WIM1E
            Yeah,mine says max. frequency is 6 GHz now..........dunno if it's a bad value in the ACPI tables or something else. And whether or not it's an AMD AGESA bug or motherboard manufacturer UEFI bug.

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            • #7
              Originally posted by Michael View Post

              There is already a patch that's been out to deal with the sysfs/cpuinfo inaccuracies, should be in 5.12/5.11/5.10 in the coming days.
              Ah, good to hear.

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              • #8
                With a bit of luck in time for Debian testing that is already on kernel 5.10.13 before it becomes stable.

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