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Thread: Ubuntu 12.10 Pushes Sandy Bridge Further

  1. #1
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    Default Ubuntu 12.10 Pushes Sandy Bridge Further

    Phoronix: Ubuntu 12.10 Pushes Sandy Bridge Further

    Recently I have shown that Intel graphics hit a high point with the Linux 3.6 kernel and that Ubuntu 12.10 is faster with Intel hardware compared to the current Ubuntu 12.04 LTS release. In this article are more Ubuntu 12.04 LTS vs. Ubuntu 12.10 benchmarks to highlight the performance improvements for Intel Sandy Bridge graphics that will be found in Ubuntu 12.10.

    http://www.phoronix.com/vr.php?view=17797

  2. #2
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    That's a nice improvement. Would some of that be due to the improvement in Unity and Compiz also?

  3. #3
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    On average 10% more power just by making the software better. That's cool.

  4. #4

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    Quote Originally Posted by phoronix View Post
    Phoronix: Ubuntu 12.10 Pushes Sandy Bridge Further

    Recently I have shown that Intel graphics hit a high point with the Linux 3.6 kernel and that Ubuntu 12.10 is faster with Intel hardware compared to the current Ubuntu 12.04 LTS release. In this article are more Ubuntu 12.04 LTS vs. Ubuntu 12.10 benchmarks to highlight the performance improvements for Intel Sandy Bridge graphics that will be found in Ubuntu 12.10.

    http://www.phoronix.com/vr.php?view=17797
    If you consider that the SNB i5-2520m Michael is using is clocked 40% faster in kernel 3.5 (Ubuntu 12.10) than in kernel 3.2 (Ubuntu 12.04) the question becomes why are not the test results showing a consumerate gain?

  5. #5
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    Quote Originally Posted by ickle View Post
    If you consider that the SNB i5-2520m Michael is using is clocked 40% faster in kernel 3.5 (Ubuntu 12.10) than in kernel 3.2 (Ubuntu 12.04) the question becomes why are not the test results showing a consumerate gain?
    Is that CPU clock, GPU clock, turbo differences, or all of the above?

  6. #6

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    Quote Originally Posted by Veerappan View Post
    Is that CPU clock, GPU clock, turbo differences, or all of the above?
    The render clock (GPU). Our initial render power management code had the oversight that we set the upper frequency to a fixed 900MHz, rather than the real value for the chip. In Michael's case, that is 1250MHz. You can check what speed your GPU is currently running at with /sys/kernel/debug/dri/0/i915_cur_delayinfo, and if we are sucessfully enabling low power idle states with /sys/kernel/debug/dri/0/i915_drpc_info.

  7. #7
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    Ew, another interface under a *debug* option that should be available to all users.

    Please consider moving it out of debugfs to any proper interface that's always there (proc, sys, ioctl, etc etc).

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