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Ubuntu 18.10 Performance Is Looking Up, But Clear Linux Still Leads In Many Tests

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  • DanglingPointer
    replied
    Yeah I think the x265 tests need to be retested again and by different people documenting how they tested, to see that the tests in this article weren't buggered.

    Leave a comment:


  • Adul
    replied
    Originally posted by vegabook View Post

    Aggressive use of AVX?
    Yeah, it definitely looks like AVX (or lack of it). For Intel, speedup on Clear Linux is close to 6x, on AMD - slightly above 3x. AFAIK, Intel CPU's have more AVX processing power. It all makes sense then.

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  • Spooktra
    replied
    First of all, thanks for the x265 benchmarks, those are the most interesting encoding benchmarks to me at this point in time and second of all, what the hell is up with the x265 benchmarks? It's almost as if the x265 version tested on Ubuntu was built with a no-asm switch. A 6x faster encoding speed on one OS vs another should immediately tell you something is very wrong, I don't care what kind of "optimization" Clear Linux developers are doing, you're not going to speed up the execution of a program 6 fold just by switching to a different distro.

    Leave a comment:


  • boxie
    replied
    Originally posted by newwen View Post
    That regresion in SciKit-Learn is very worrying. Any clue on what could be causing it?
    Any one of a million tuning knobs set to 0.1 instead of 1.01 ?
    I hope that this gets raised as a bug and fixed before release.

    Leave a comment:


  • newwen
    replied
    That regresion in SciKit-Learn is very worrying. Any clue on what could be causing it?

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  • blackshard
    replied
    Originally posted by vegabook View Post

    Aggressive use of AVX?
    Yeah, and why they work in Clear Linux but not in Ubuntu?
    Some compute heavy benchmarks (like h.265, but also lame encoding) are showing there is something wrong in Ubuntu 18.04/18.10, such performance gap is not sane and could not be just related to "finetuning"

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  • sarfarazahmad
    replied
    You think throwing Debian testing into the mix would help since Ubuntu derives from Debian ?

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  • vegabook
    replied
    Originally posted by darkbasic View Post
    How is the x265/lame thing even possible? Especially x265 which is supposed to use mostly hand-tuned assembly.
    Aggressive use of AVX?

    Leave a comment:


  • vegabook
    replied
    Oh brother, 18.10 looks terrible for data science. What's the deal on the R and scikit-learn benches??

    These two order-of-magnitude regressions smack any small percentage improvements elsewhere into oblivion.

    There has to be some BLAS library shenanigans going on.

    Leave a comment:


  • darkbasic
    replied
    How is the x265/lame thing even possible? Especially x265 which is supposed to use mostly hand-tuned assembly.

    Leave a comment:

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