[Bug 109171] AMD's GPU is Slower than Intel's

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109171

            Bug ID: 109171
           Summary: AMD's GPU is Slower than Intel's
           Product: Mesa
           Version: 18.2
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: Drivers/Gallium/r600
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: ali.sherif10 at yahoo.com
        QA Contact: dri-devel at lists.freedesktop.org

glxgears and CS: Go are much slower with AMD's GPU. Performance's much higher
with Intel's.

Outputs:
$ glxgears
306 frames in 5.0 seconds = 61.029 FPS
299 frames in 5.0 seconds = 59.761 FPS
299 frames in 5.0 seconds = 59.762 FPS
299 frames in 5.0 seconds = 59.762 FPS
299 frames in 5.0 seconds = 59.762 FPS

$ DRI_PRIME=1 glxgears
304 frames in 5.0 seconds = 60.666 FPS
299 frames in 5.0 seconds = 59.762 FPS
299 frames in 5.0 seconds = 59.762 FPS
299 frames in 5.0 seconds = 59.763 FPS
299 frames in 5.0 seconds = 59.760 FPS

$ vblank_mode=0 glxgears
ATTENTION: default value of option vblank_mode overridden by environment.
32606 frames in 5.0 seconds = 6521.047 FPS
31516 frames in 5.0 seconds = 6302.010 FPS
32145 frames in 5.0 seconds = 6428.891 FPS
31443 frames in 5.0 seconds = 6288.595 FPS
31029 frames in 5.0 seconds = 6205.721 FPS

$ DRI_PRIME=1 vblank_mode=0 glxgears
ATTENTION: default value of option vblank_mode overridden by environment.
12031 frames in 5.0 seconds = 2406.195 FPS
10110 frames in 5.0 seconds = 2021.870 FPS
10122 frames in 5.0 seconds = 2022.474 FPS
9782 frames in 5.0 seconds = 1956.206 FPS
10175 frames in 5.0 seconds = 2034.901 FPS


Laptop: HP Pavilion g6.
AMD's GPU: Radeon HD 7670M.
OS: 64-bit Linux (Fedora 29 KDE Spin).

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