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Linux 3.12 Brings Big AMD Radeon Improvements

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  • Linux 3.12 Brings Big AMD Radeon Improvements

    Phoronix: Linux 3.12 Brings Big AMD Radeon Improvements

    The Linux 3.12 kernel when released in the coming weeks will bring a number of new features and improvements to AMD Radeon graphics cards, including faster performance. For many Linux games tested the Radeon Gallium3D OpenGL frame-rates were making double-digit gains through upgrading the Linux kernel.

    http://www.phoronix.com/vr.php?view=19191

  • #2
    Nice results!
    I'll celebrate the day phoronix Radeon FOSS benchmarks are being compared with catalyst.

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    • #3
      Mother of GOD! what a big improvement, but it was felt on the HD 7000 series too?

      Comment


      • #4
        Impressive. I seem to remember that radeon was not that far away of Catalyst, this could bring it on par or even ahead, at least on the tested benchmarks.
        So two questions for the AMD devs :

        - What's in the 3.12 kernel that brings such a large performance increase?
        - Is this increase supposed to occur on the whole Radeon range of cards or was Michael just (un)lucky to pick the one that sees the best results?

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        • #5
          Originally posted by rvdboom View Post
          - What's in the 3.12 kernel that brings such a large performance increase?
          - Is this increase supposed to occur on the whole Radeon range of cards or was Michael just (un)lucky to pick the one that sees the best results?
          Quoted for importance.

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          • #6
            Originally posted by rvdboom View Post
            - What's in the 3.12 kernel that brings such a large performance increase?
            Pretty sure it sayes what happned right in the article, should also affect most GPUs.
            a major ring handling clean-up, removal of old 3D blit code to now handle buffer object moves with the CP DMA / sDMA engines

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            • #7
              How can I run this exact test suite on my machine?

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              • #8
                These are definitely great improvements.
                Would be interesting to see a direct comparison against fglrx.

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                • #9
                  Originally posted by theghost View Post
                  These are definitely great improvements.
                  Would be interesting to see a direct comparison against fglrx.
                  Yes it would, both fglrx and Catalyst on Windows.

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                  • #10
                    Are there any visual glitch as you mention sometimes ? Incorrect rendering sometimes leads to better performance (filters not applied, textures missing).

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                    • #11
                      Originally posted by theghost View Post
                      These are definitely great improvements.
                      Would be interesting to see a direct comparison against fglrx.
                      And please with some contemporary games. No one care this games.

                      Comment


                      • #12
                        Originally posted by przemoli View Post
                        How can I run this exact test suite on my machine?

                        I think it would be the following:
                        phoronix-test-suite benchmark 1310099-SO-RADEONRV716

                        If you ever want more information about the system that a test was run on, or how openbenchmarking got the numbers that created a graph, click on the little white/blue cube icon on the lower left of a graph. It'll take you to the page that the result set is hosted at, and there's information at the bottom of the page about how to recreate the result... You'll need to install the phoronix-test-suite first (either through downloading manually or through your package manager).

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                        • #13
                          Originally posted by rvdboom View Post
                          Impressive. I seem to remember that radeon was not that far away of Catalyst, this could bring it on par or even ahead, at least on the tested benchmarks.
                          So two questions for the AMD devs :

                          - What's in the 3.12 kernel that brings such a large performance increase?
                          - Is this increase supposed to occur on the whole Radeon range of cards or was Michael just (un)lucky to pick the one that sees the best results?
                          The blit change I believe was this commit:
                          http://cgit.freedesktop.org/~agd5f/l...8663386498aafa

                          It seems to support any card that uses r600g (or at least a lot of them), but I don't see any mention of SI... whether that's because it's unnecessary (already implemented), not applicable to SI, not done in this commit, or just not done is another question.

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                          • #14
                            Originally posted by Veerappan View Post
                            The blit change I believe was this commit:
                            http://cgit.freedesktop.org/~agd5f/l...8663386498aafa

                            It seems to support any card that uses r600g (or at least a lot of them), but I don't see any mention of SI... whether that's because it's unnecessary (already implemented), not applicable to SI, not done in this commit, or just not done is another question.
                            The only asic that commit affects is r6xx chips. R7xx and newer are not affected since they use the async dma rings for bo moves and have since kernel 3.8 or so. The only time the new cpdma code would come into effect for newer chips is when you run the kernel bo tests. TBH, I don't know of any particular changes that would have had much impact on performance.

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                            • #15
                              Heres how you do it.


                              Get an AMD-7850 = New popular upper-mid range card, good value to performance to wattage

                              Test1: Windows8-Catalyst VS Ubuntu-Catalyst with the latest everything closed on DOTA2 / TF2 / Counter Strike Source / Trine 2 @ 1080p

                              Test2: Ubuntu-FOSS VS Ubuntu-Catalyst with the latest everything open v closed on DOTA2 / TF2 / Counter Strike Source / Trine 2 @ 1080p


                              Make a clear graph of FPS one next to the other so we can see the general performance index of Windows Vs Linux on closed and then Linux VS Linux on Open.

                              Nice and easy to read so new to linux non technical gamers can understand just how close they can be to moving to Linux and how much there going to lose overal vs Windows. We already know Nvidia's closed are identical to windows 8 so what we want to know now is how close are AMD coming to getting equal performance results in games with Ubuntu steam and SteamOS around the corner.

                              I.E are those who want to ditch windows able to do so on AMD or should they Go Nvidia seen as Valve is siding their builds with team green due to drivers.

                              Have AMD + the new Kernal Made it a level playing field or close to it ?


                              Thanks

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