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Thread: Intel Linux OpenGL Driver Remains Slower Than Windows

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  1. #1
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    Default Intel Linux OpenGL Driver Remains Slower Than Windows

    Phoronix: Intel Linux OpenGL Driver Remains Slower Than Windows

    Recently there was the NVIDIA graphics comparison under Windows 7 and Linux providing new data at how the cross-platform NVIDIA driver is comparing between Ubuntu 12.10, Kubuntu 12.10, and Windows 7 Pro. Aside from Ubuntu's Unity desktop with Compiz impairing the performance, the results were competitive. Next up now is a look at Intel Sandy Bridge and Intel Ivy Bridge graphics when comparing the performance of the three operating systems.

    http://www.phoronix.com/vr.php?view=17920

  2. #2

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    The nexuiz result is quite surprising. Are you using S3TC with mesa driver?

  3. #3
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    Default You should upgrade the test

    For Unigine Heaven there is just the Windows 7 numbers since the Intel Linux support for this more demanding game engine isn't in great shape on Mesa.
    I'm running UH3.0 without significant problems on 9.0 branch (last week) and mesa master. Yes, I need to run on medium shaders and no tesselation because of missing features, but it's far from unusable.

  4. #4
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    Nice to hear, however it is not really surprising that linux is often slower than win - the driver does not share code between the os. That's differnt to fglrx/nvidia binary drivers.

  5. #5
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    Quote Originally Posted by orome View Post
    I'm running UH3.0 without significant problems on 9.0 branch (last week) and mesa master. Yes, I need to run on medium shaders and no tesselation because of missing features, but it's far from unusable.
    I'm also curious what the issue is. I run Unigine Heaven rather frequently and it works for me. Note that you need to install the drirc that comes with Mesa: cp src/mesa/drivers/dri/common/drirc /etc/drirc # or ~/.drirc. (The intent is that distributions should do this for you...) This tells Mesa to work around a number of bugs in the Unigine demos: their use of extensions without asking for them, and their broken use of the GL_ARB_blend_func_extended extension. Without it, I believe you get cloudy grey rendering.

    There were a few Mesa bugs relating to Heaven as well, but those should have already been fixed in the version that Michael tested.

  6. #6
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    Quote Originally Posted by Kayden View Post
    This tells Mesa to work around a number of bugs in the Unigine demos: their use of extensions without asking for them, and their broken use of the GL_ARB_blend_func_extended extension. Without it, I believe you get cloudy grey rendering.

    There were a few Mesa bugs relating to Heaven as well, but those should have already been fixed in the version that Michael tested.
    Didn't they fix the bugs in Heaven? Or only some?

    Certainly app workarounds in the gl lib are just wrong.

  7. #7
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    Nice progress Intel Looks like the performance gap between Windows and Linux is closing for these drivers.

  8. #8
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    Quote Originally Posted by curaga View Post
    Didn't they fix the bugs in Heaven? Or only some?

    Certainly app workarounds in the gl lib are just wrong.
    Some, but not all, sadly.

  9. #9
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    Quote Originally Posted by curaga View Post
    Didn't they fix the bugs in Heaven? Or only some?

    Certainly app workarounds in the gl lib are just wrong.
    They fixed many in Heaven 3.0 so that it runs quite nice (visually) on radeon OSS. But Sanctuary and Tropics was not updated in recent years so they are quite broken.

  10. #10
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    Quote Originally Posted by enrico.tagliavini View Post
    The nexuiz result is quite surprising. Are you using S3TC with mesa driver?
    From http://openbenchmarking.org/system/1...012.10/glxinfo
    OpenGL extensions:
    <snip>
    GL_EXT_texture_compression_s3tc, GL_EXT_texture_env_combine,

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