[Bug 83482] [BDW Bisected]Doom3 v1.3.1/etqw-demo/Lightsmarkv2008/OpenArena v0.8.8/warsow v1.0/Xonotic v0.7/CS/Half life2/Team Fortress 2/Portal/GpuTest v0.5/Unigine-demos/GLBenchmarkv2.5.1/v2.7.0/Synmark2_v6 performance reduced 10%~40%

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83482

--- Comment #2 from Eero Tamminen <eero.t.tamminen at intel.com> ---
When looking at the performance drop in test results between 27.8. -> 1.9.
(which testers stated to be because of this bug), the largest drop is for
OglPSPhong & OglFillTexMulti, their performance was earlier about 2.5x.

Interestingly, there was exactly same sized BDW perf improvement around 6.8. -
10.8, which is now gone.

Looking at all the affected tests, issue seems to be with pixel shader
performance and GPU memory bandwidth.

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