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Linux 5.0 To Linux 5.9 Kernel Benchmarking Was A Bumpy Ride With New Regressions

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  • Linux 5.0 To Linux 5.9 Kernel Benchmarking Was A Bumpy Ride With New Regressions

    Phoronix: Linux 5.0 To Linux 5.9 Kernel Benchmarking Was A Bumpy Ride With New Regressions

    Recently carrying out some benchmarks of all major kernel releases from Linux 5.0 through Linux 5.9 ended up yielding some surprising performance changes with the in-development 5.9 kernel. Here's details on this historical look at the kernel performance and what's going on with the Linux 5.9 kernel slowdowns.

    http://www.phoronix.com/vr.php?view=29483

  • #2
    Well done. At least with EPYC bisecting is "a bit" faster process.

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    • #3
      Really great work on finding the regressions in this article!

      Comment


      • #4
        Originally posted by leipero View Post
        Well done. At least with EPYC bisecting is "a bit" faster process.
        Yeah I wouldn't bother bisecting kernel or any large code-base these days with less than 64 cores.... Would have done my dual 7742 2P server if it were not busy with other work.
        Michael Larabel
        http://www.michaellarabel.com/

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        • #5
          I specifically upgraded to a new amd cpu for working on DevilutionX since refactoring took way to long to test. Mine only has 16 threads but that got me to my targeted sub 10 sec for a clan build.

          What is the compile time for the kernel on this system?

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          • #6
            Originally posted by AJenbo View Post
            I specifically upgraded to a new amd cpu for working on DevilutionX since refactoring took way to long to test. Mine only has 16 threads but that got me to my targeted sub 10 sec for a clan build.

            What is the compile time for the kernel on this system?
            Kernel build times for the 7702 and others can be found at https://openbenchmarking.org/test/pt...d-linux-kernel
            Michael Larabel
            http://www.michaellarabel.com/

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            • #7
              Originally posted by oibaf View Post
              Really great work on finding the regressions in this article!
              Thanks
              Michael Larabel
              http://www.michaellarabel.com/

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              • #8
                yeah, ever changing code, the more change, the more regressions, ... https://www.youtube.com/watch?v=E6eBKMfZxFc

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                • #9
                  Originally posted by oibaf View Post
                  Really great work on finding the regressions in this article!
                  When out of all huge multibillion dollar companies (IBM, Intel, Microsoft et al) and individuals working on the kernel, Phoronix (which is run by a single individual) finds mission-critical regressions which cut performance by half, it speaks volumes about how Linux is being developed. People are arguing if it's ready for the desktop, meanwhile the core part of Linux is being sabotaged all the fucking time. It's quite sad really. In a perfect world we would see performance increases with each release, instead the fastest kernel out of the ten which have been tested, is 5.2 which was released over a year ago. That's appalling.

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                  • #10
                    Originally posted by birdie View Post
                    Typical birdie rant
                    ​​​​​​​
                    What? Tell us more about your perfect world where every performance drop off unreleased software is spotted.

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