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GCC vs. Clang Compiler Benchmarks On POWER9 With Raptor's Blackbird

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  • GCC vs. Clang Compiler Benchmarks On POWER9 With Raptor's Blackbird

    Phoronix: GCC vs. Clang Compiler Benchmarks On POWER9 With Raptor's Blackbird

    While for Intel x86_64 with the latest compilers it's a very competitive race between LLVM Clang and GCC, how is that battle playing out on the IBM POWER9 front? Using the interesting Raptor Blackbird with IBM POWER9 4-core / 16-thread CPU, here are some recent benchmarks I did between GCC 9, GCC 10, and LLVM Clang 8.

    http://www.phoronix.com/vr.php?view=28096

  • #2
    Michael Comments link in the article not working? https://www.phoronix.com/forums/node/1115363 gives me an unauthorized error, but navigating through the forum works fine.

    Interesting that gcc10 seems to regress in a lot of tests from gcc9.

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    • #3
      Originally posted by squash View Post
      Michael Comments link in the article not working? https://www.phoronix.com/forums/node/1115363 gives me an unauthorized error, but navigating through the forum works fine.

      Interesting that gcc10 seems to regress in a lot of tests from gcc9.
      Should be fixed now, thanks.
      Michael Larabel
      http://www.michaellarabel.com/

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      • #4
        Originally posted by Michael View Post

        Should be fixed now, thanks.
        Just to inform you: I am active between 12PM and 2AM UTC -5, which is why I couldn't approve the post in time.

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        • #5
          Typo:

          Originally posted by phoronix View Post
          In the SciMark 2.0 C micro-benchmarks is one of the cases where LLVM Clang overall wasd outperforming GCC.

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          • #6
            v0.3 and no HIB patchset applied yet......... dav1d results
            4K

            Clang: 9fps
            GCC 9: 9fps
            GCC 10: 9fps
            1080p

            GCC 9: 38.49fps
            GCC 10: 39.15fps
            Clang: 39.97fps

            Still not ready for 4K or 1080p60.

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            • #7
              What I wouldn't do to see a 4C/16T or 4C/32T x86-64 cpu.

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