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AMD's Marek Has A Patch Helping To Reduce Gallium3D Input Lag

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  • AMD's Marek Has A Patch Helping To Reduce Gallium3D Input Lag

    Phoronix: AMD's Marek Has A Patch Helping To Reduce Gallium3D Input Lag

    In addition to the work this week on exposing EXT_gpu_shader4 / EXT_texture_buffer_object, well known AMD open-source developer Marek Olšák has also been working a patch to help lower the input lag with Mesa...

    http://www.phoronix.com/scan.php?pag...ower-Input-Lag

  • #2
    Cool! This is an area where Mesa has been lagging... (Haha). Could there be tuneables? Metrics that you could turn on?

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    • #3
      nice to see this, also the fact that it affects all gallium drivers is extra nice

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      • #4
        Awesome! I really hope it fixes this VSync miscompliance:

        ​​​​​​

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        • #5
          Input lag is so terrible, a relief that people in the Linux world care about it.

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          • #6
            Originally posted by aufkrawall View Post
            Input lag is so terrible, a relief that people in the Linux world care about it.
            Google's Stadia and the whole Linux gaming crowd are surely interested in any latency / input lag advancements on Linux. And as it gets more popular it should be also getting more attention for optimizations.

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            • #7
              marek what is input lag in this context? As you cited Unigine Heaven example, is there any input in the sense of moving the camera around with the mouse/cursor, is this kind of input lag the patches tries to fix?

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              • #8
                Thanks, the work here is much appreciated and valued!

                I wonder how this would be tested (to validate changes and avoid regressions)

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                • #9
                  AMD has no money for a 4K monitor, weird.
                  https://lists.freedesktop.org/archiv...il/218481.html

                  "I don't have a 4K monitor"

                  No wonder that Polaris 10 users must use the amdgpu.ppfeaturemask=0xfffd7fff kernel command line parameter to make powerplay work at 4K60Hz.

                  @Jabberwocky One way to apply patches for mesa is to download the Padoka or OIbaf ppa Mesa git source package and apply a patch for it. Edit the meson_option.txt file and remove unneeded drivers. Install development packages, create the build directory and compile with: ninja -j 12 -C build/. Copy the produced binary file to the correct system directory.
                  Last edited by debianxfce; 04-29-2019, 04:28 AM.

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                  • #10
                    Originally posted by tildearrow View Post
                    Awesome! I really hope it fixes this miscompliance:
                    There is nothing wrong in the open source Mesa driver. Test with the War Thunder game
                    Last edited by debianxfce; 04-28-2019, 09:53 PM.

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