[Mesa-dev] [Bug 97260] R9 290 low performance in Linux 4.7

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97260

--- Comment #66 from tarpoon at gmx.de ---
Okay. I bisected the issue today already:

7050c6ef5f0e9bc5e6bf9eb035320b70f731b919 is the first bad commit
commit 7050c6ef5f0e9bc5e6bf9eb035320b70f731b919
Author: Arindam Nath <arindam.nath at amd.com>
Date:   Wed Apr 6 15:33:51 2016 -0400

    drm/radeon: add support for loading new UVD fw

    Signed-off-by: Christian König <christian.koenig at amd.com>
    Signed-off-by: Arindam Nath <arindam.nath at amd.com>
    Reviewed-by: Leo Liu <leo.liu at amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher at amd.com>

:040000 040000 25ff8fc8784746ea4e371a13655581a3e844e7b9
9016d0a57c0409e91eff182bbccd91510a8b85c1 M      drivers

I use mesa from oibaf ppa:

glxinfo | grep -i opengl
OpenGL vendor string: X.Org
OpenGL renderer string: Gallium 0.4 on AMD HAWAII (DRM 2.43.0 /
4.6.0-rc3-funfzehn, LLVM 4.0.0)
OpenGL core profile version string: 4.5 (Core Profile) Mesa 17.1.0-devel
OpenGL core profile shading language version string: 4.50
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
OpenGL version string: 3.0 Mesa 17.1.0-devel
OpenGL shading language version string: 1.30
OpenGL context flags: (none)
OpenGL extensions:
OpenGL ES profile version string: OpenGL ES 3.1 Mesa 17.1.0-devel
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.10
OpenGL ES profile extensions:


I also tested the 4.10 kernel, it has the same issue.


Content of /sys/kernel/debug/dri/64/radeon_pm_info in the start menu of Shadow
of Morder (which has 100 FPS in 4.6.7 and 25 FPS in 4.7.0 and later):

Before starting the game:
uvd    disabled
vce    disabled
power level avg    sclk: 30000 mclk: 15000

In the main menu of the game with 4.7.0
uvd    disabled
vce    disabled
power level avg    sclk: 100000 mclk: 15000

In the main menu of the game with 4.6.7
uvd    disabled
vce    disabled
power level avg    sclk: 91198 mclk: 126000

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