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AMD RadeonSI Gallium3D Performance Has A Long Way To Go

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  • #16
    The same can be said for Catalyst, which performs horribly for GCN.

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    • #17
      Originally posted by ChrisXY View Post
      Schrödinger's cat. Come on, you have unicode support, don't you?
      Indeed, and got to love that Compose button ☺

      As a side note, the Fedora codenames are pretty fun. I used both Spherical Cow and Schrödinger's Cat quite extensively lately, since one of the courses I had was Physics.

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      • #18
        As others have said, RadeonSI performance can be greatly improved either by selecting profile based power management and then setting /sys/class/drm/card0/device/power_profile to high, or by using a 3.11 kernel. Interestingly, when using a 3.11 kernel it seems like it will not be necessary to enable the new "DPM" power mangement (by adding radeon.dpm=1 to the GRUB kernel boot options) to get good performance (although of course enabling DPM will reduce power consumption and lower heat output) - I have found the following patch in the 3.11 kernel:

        author Alex Deucher 2013-07-05 17:14:30 (GMT)
        committer Alex Deucher 2013-07-05 22:08:54 (GMT)
        commit c6cf7777a32da874fabec4fd1c2a579f0ba4e4dd
        tree 22a8b1f3b98714760a24b69f7d45d56c716dcfe0
        parent 338a95a95508537e23c82d59a2d87be6fde4b6ff

        drm/radeon: set default clocks for SI when DPM is disabled

        Fix patching of vddc values for SI and enable manually forcing clocks to default levels as per NI.

        This improves the out of the box performance with SI asics.

        Signed-off-by: Alex Deucher

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        • #19
          Originally posted by madbiologist View Post
          As others have said, RadeonSI performance can be greatly improved either by selecting profile based power management and then setting /sys/class/drm/card0/device/power_profile to high, or by using a 3.11 kernel.
          HAHAHAHAHAHAHA no. Actually get a Radeon HD 7xxx and try for yourself. Performance sucks and this will not help much at all. The only thing playable is 2D indie games or old games like HL1, and even then framerate is low. If you use 3.11 kernel and mesa git, many games are currently broken.
          Last edited by mmstick; 07-29-2013, 05:51 PM.

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          • #20
            Originally posted by mmstick View Post
            HAHAHAHAHAHAHA no. Actually get a Radeon HD 7xxx and try for yourself. Performance sucks and this will not help much at all. The only thing playable is 2D indie games or old games like HL1, and even then framerate is low. If you use 3.11 kernel and mesa git, many games are currently broken.
            Setting the power_profile to high does seem to help a fair bit - see http://phoronix.com/forums/showthrea...160#post341160

            And yes, we know that rendering in Xonotic was broken a month ago. Remember that the 3.11 kernel is still a work in progress.

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