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Benchmarking Ubuntu's Low-Latency Kernel & Liquorix Post-Meltdown

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  • Benchmarking Ubuntu's Low-Latency Kernel & Liquorix Post-Meltdown

    Phoronix: Benchmarking Ubuntu's Low-Latency Kernel & Liquorix Post-Meltdown

    A new Phoronix Premium member was hypothesizing in the forums whether Ubuntu's low-latency kernel would be performing better in the wake of the Kernel Page Table Isolation (KPTI) support in the kernel for fending off the Meltdown CPU vulnerability. With always aiming to deliver on test requests by premium members, I ran some benchmarks of the Ubuntu low-latency vs. generic kernels and I also tossed in the Liquorix kernel for benchmarking too.

    http://www.phoronix.com/vr.php?view=25860

  • #2
    Here's how one can achieve real smoothness:

    - Use openSUSE Tumbleweed, since it contains the best Linux Kernel config by default. (250Hz tick timer, PREEMPT enabled)

    - Use the deadline İO scheduler.

    - Use the 'performance' governor.

    - Additionally, if stuck on İntel, make sure to set the 'performance-bias' to '0'!

    Now enjoy your silky-smooth Linux experience!

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    • #3
      Originally posted by Linuxxx View Post
      the best Linux Kernel config by default. (250Hz tick timer)
      inb4 debianxfce

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      • #4
        Typos:

        Originally posted by phoronix View Post
        enables PRREMPT support, changes to 1000Hz tick from 250Hz, and enables LATENCYTOP support.

        The Liquorix kenrel continues to be

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        • #5
          As a new premium member ;-) ... Thank you very much Michael!

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          • #6
            Originally posted by tildearrow View Post
            Typos:
            Thanks, hope you recovered well from being ill.
            Michael Larabel
            http://www.michaellarabel.com/

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            • #7
              Originally posted by Steffen Bergner View Post
              As a new premium member ;-) ... Thank you very much Michael!
              Thanks and cheers.
              Michael Larabel
              http://www.michaellarabel.com/

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              • #8

                I'm surprised Liquorix topped any tests, as I'm pretty sure it is tuned for UX and low latency rather than throughput (which is why I use it).

                Sure would be interesting if somebody could measure actual input latency in say CS:GO with a variety of hardware and software. I can't find anything like that online, other than someone testing the Dolphin emu on windows.

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                • #9
                  Originally posted by Linuxxx View Post
                  Here's how one can achieve real smoothness:

                  - Use openSUSE Tumbleweed, since it contains the best Linux Kernel config by default. (250Hz tick timer, PREEMPT enabled)

                  - Use the deadline İO scheduler.

                  - Use the 'performance' governor.

                  - Additionally, if stuck on İntel, make sure to set the 'performance-bias' to '0'!

                  Now enjoy your silky-smooth Linux experience!
                  Damn son, what is this, XDA?

                  I'll just say BFQ beats Deadline by a long shot when under moderate/heavy I/O, and it's only going to get better.

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                  • #10
                    wow thanks Michael

                    Liqourix was looking promising as I started reading until it came to nginx/apache and redis performance (my focus)

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