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Thread: Intel Ivy Bridge Performance Drops In Mesa 8.1

  1. #1
    Join Date
    Jan 2007
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    Default Intel Ivy Bridge Performance Drops In Mesa 8.1

    Phoronix: Intel Ivy Bridge Performance Drops In Mesa 8.1

    In recent days there have been updated Mesa 8.1 development benchmarks put out looking at the R600 Gallium3D, R300 Gallium3D, and Nouveau Gallium3D open-source drivers. Those results for the different drivers show that Mesa 8.1 is generally faster than the current Mesa 8.0 stable series, but that does not appear to be the case for Intel at the moment. It looks like there are some active regressions that are lowering the Intel Ivy Bridge graphics performance with their Mesa 8.1-devel driver.

    http://www.phoronix.com/vr.php?view=17670

  2. #2
    Join Date
    Jun 2012
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    Default Interesting....

    Lacking much knowledge on the subject, could this performance regression be due to a more OpenGL-compliant rendering than Radeon and Nouveau?

  3. #3
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    Default

    Quote Originally Posted by Prince781 View Post
    Lacking much knowledge on the subject, could this performance regression be due to a more OpenGL-compliant rendering than Radeon and Nouveau?
    I don't even know if we have to bring Nouveau/Radeon into it. If Intel fixed some non-compliant rendering issues in 8.1, that alone could explain the changes.

    It is interesting that almost all applications seem affected to some degree. This hints at something that might affect the entire driver, and not just specific extensions/features.

  4. #4
    Join Date
    Jan 2011
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    Default

    Quote Originally Posted by Prince781 View Post
    Lacking much knowledge on the subject, could this performance regression be due to a more OpenGL-compliant rendering than Radeon and Nouveau?
    We've seen this before though haven't we?

    Performance seems to go down when focus is on new features, then pops back up when the tweakers go back through and add their commits.

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