[Bug 65694] New: [HSW] FBC didn’t save power for game workload

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=65694

          Priority: medium
            Bug ID: 65694
                CC: lianyuex.yang at intel.com, ouping.zhang at intel.com
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [HSW] FBC didn’t save power for game workload
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: tienan.liu at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

System Environment:
----------------------------------------
Platform: HSW
Libdrm:                       (master)libdrm-2.4.45-3-

g3586337f3703ce4833a375f66b08df064a1cec28
Mesa:                          (master)f6beb4c6b647b0d5077c7abd6c99cdaba6e0c112
Xserver:                      (master)xorg-server-1.14.99.1-82-

g7e97166c4fc38076b6224e4dbdd632b43444149f
Xf86_video_intel:        
(master)2.21.6-47-gd6c30d1d4df6bcdfa075bd29da7c8aabee20774c
Cairo:                         (master)631bf299256e11a17511977f357e0353fb5615f7
Libva:                         
(staging)880c916092c6d68096c95e49405714d8a21f9322
Libva_intel_driver:        (staging)0a5cfdab47c788569feb0a3e4293906687523f88    
Kernel:                        (drm-intel-nightly)
675fa342aa3a54af0a81f23809fff9590dfb6fc1


Test result:
----------------------------------------      
HSW-ult      FBC disable Average_watt       FBC enable Average_watt          
game         21                             21

IVB          FBC disable Average_watt       FBC enable Average_watt
game         34.8                           34.7 

Findings:
----------------------------------------
For game, FBC saved 0.1w on IVB, but didn’t saved power on HSW.
FBC pass/fail criteria is 0.1-0.2w.

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