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Thread: Benchmarking The Ubuntu "Low-Jitter" Linux Kernel

  1. #1
    Join Date
    Jan 2007
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    15,125

    Default Benchmarking The Ubuntu "Low-Jitter" Linux Kernel

    Phoronix: Benchmarking The Ubuntu "Low-Jitter" Linux Kernel

    There's an independently maintained "low-jitter" version of the Linux kernel targeting Ubuntu, which claims to be faster, but is that really the case?..

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

  2. #2

    Default

    This article made me laugh so much, thanks! Nothing like a good old placebo.

  3. #3
    Join Date
    Aug 2011
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    76

    Default missing the point

    the thing is not called low _jitter_ for no reason ... maybe you should actually also benchmark jitter in various fields (eg. std. distribution of apache response times, frame jitter, ...) instead of "raw performance"

  4. #4
    Join Date
    Oct 2011
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    54

    Unhappy Missing the point indeed

    The whole point of low jitter is low jitter. Running throughput benchmarks pretty much misses the point.

  5. #5
    Join Date
    Dec 2007
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    677

    Default

    Well that was a joke. Where's the magical 3x performance and amazing desktop responsiveness promised by the posters?

    Compile your own kernel, they said...

  6. #6
    Join Date
    Nov 2011
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    65

    Default

    Check out TechReport's articles on what jitter is... that might help for next time. These benchmarks have absolutely nothing to do with jitter.

  7. #7
    Join Date
    Mar 2011
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    92

    Default

    1. Benchmarks just proved that those patches in fact have impact on the kernel
    2. They are likely actually improve the responsivness as one would except the lower scores that might come cause of extra overhead.
    3, One should be happy that drops in overal performance is hardly noticable

    ps anyone tested the patches and may comment about the "low-jitter"?

  8. #8
    Join Date
    Jan 2009
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    1,708

    Default

    How is jitter defined in computer kernels. I know what jitter is in electronics but kernels?

  9. #9
    Join Date
    Jul 2010
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    503

    Default

    Quote Originally Posted by 89c51 View Post
    How is jitter defined in computer kernels. I know what jitter is in electronics but kernels?
    Delay variation till a process gets the cpu again due to scheduling I think.

  10. #10
    Join Date
    Sep 2010
    Posts
    67

    Default

    You should punch some speed holes in your car. I did it. It works.

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