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Benchmarking Clear Linux With KPTI + Retpoline Support

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  • Benchmarking Clear Linux With KPTI + Retpoline Support

    Phoronix: Benchmarking Clear Linux With KPTI + Retpoline Support

    Yesterday Intel landed KPTI page table isolation and Retpoline support in their Clear Linux distribution. Given that one of the pillars of this Intel Open-Source Technology Center platform is on delivering optimal Linux performance, I was curious to see how its performance was impacted. Here are before/after benchmarks on seven different systems ranging from low-end Pentium hardware to Xeon servers.

    http://www.phoronix.com/vr.php?view=25821

  • #2
    So basically the biggest changes are in Redis & ApacheBench, which are two great synthetic benchmarks but are not that indicative of real-world performance* considering the post-fix consumer-grade 8700K annihilates a $4000 Epyc part in both Redis & ApacheBench.

    https://www.phoronix.com/scan.php?pa...nchmarks&num=1

    * Unless you want to say that they *are* useful real-world benchmarks just to whine about the "performance hit" on Intel platforms while having no excuse as to why Epyc is apparently permanently crippled in silicon.

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    • #3
      Like it annihilates in Redis 2 Xeon Gold 6138, which are also dominated by a single Ryzen 1800X.........
      Same for Apache.
      So either the graphics should be read as the shorter the faster or these are very far from being server benches, don't they?

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      • #4
        So "from 0% up to 30%" actually means that out of 1001 apps tested average is 5%

        So, on average negligible

        Same like someone compare distros performance, these are also on average negligible with just couple weird cases here and there
        Last edited by dungeon; 01-09-2018, 10:51 AM.

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        • #5
          Is this payed article? How suddenly their is no 8xxx Intel generation that had the hardest performance hit? Put back in original i7 8700K system from initial testing!

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          • #6
            Originally posted by Zola View Post
            Is this payed article? How suddenly their is no 8xxx Intel generation that had the hardest performance hit? Put back in original i7 8700K system from initial testing!
            The 8700K wasn't tested since that system is busy now with graphics card testing.... I don't just keep running the same tests on the same system over and over. Over time there will be more 8700K tests with Retpoline and KPTI patches as they mature but at the moment that system is running a large GPU comparison.
            Michael Larabel
            http://www.michaellarabel.com/

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            • #7
              Originally posted by chuckula View Post
              So basically the biggest changes are in Redis & ApacheBench, which are two great synthetic benchmarks but are not that indicative of real-world performance* considering the post-fix consumer-grade 8700K annihilates a $4000 Epyc part in both Redis & ApacheBench.

              https://www.phoronix.com/scan.php?pa...nchmarks&num=1

              * Unless you want to say that they *are* useful real-world benchmarks just to whine about the "performance hit" on Intel platforms while having no excuse as to why Epyc is apparently permanently crippled in silicon.
              Straw man.

              Redis & Apache love high clocks, and guess what? You're comparing very high clock cpu to middle range clock cpu. Come back when you have a useful comparison.

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              • #8
                Originally posted by chuckula View Post
                So basically the biggest changes are in Redis & ApacheBench, which are two great synthetic benchmarks but are not that indicative of real-world performance* considering the post-fix consumer-grade 8700K annihilates a $4000 Epyc part in both Redis & ApacheBench.

                https://www.phoronix.com/scan.php?pa...nchmarks&num=1

                * Unless you want to say that they *are* useful real-world benchmarks just to whine about the "performance hit" on Intel platforms while having no excuse as to why Epyc is apparently permanently crippled in silicon.
                Seriously did AMD murder your family? Did you invest in them right before the release of Bulldozer? This article has NOTHING to do with AMD and yet they're the only thing you can focus on lately. If you're going to draw negative attention to them, you may want to stop comparing apples to oranges while cherry-picking results (fruit theme unintentional).

                The fact of the matter is, these tests showed a lot of performance losses. It's not a big deal: these tests aren't going to prevent me from recommending Intel. Hell, this whole fiasco isn't something that would prevent me from recommending Intel - it was a mistake. But for whatever reason you're getting super insecure and it's really starting to get pathetic, and annoying. Relax - Intel isn't going anywhere. Quit your whining and just accept that everyone from all sides are taking a loss to some degree.
                Last edited by schmidtbag; 01-09-2018, 11:31 AM.

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                • #9
                  Originally posted by chuckula View Post
                  So basically the biggest changes are in Redis & ApacheBench, which are two great synthetic benchmarks but are not that indicative of real-world performance* considering the post-fix consumer-grade 8700K annihilates a $4000 Epyc part in both Redis & ApacheBench.

                  https://www.phoronix.com/scan.php?pa...nchmarks&num=1

                  * Unless you want to say that they *are* useful real-world benchmarks just to whine about the "performance hit" on Intel platforms while having no excuse as to why Epyc is apparently permanently crippled in silicon.
                  your damage control mode is starting to get boring

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                  • #10
                    Suggestion: Soon it's time to redo all the AMD vs Intel CPU benchmarks.

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