[Bug 86242] [BDW Bisected] Unigine-valley_1_0 performance reduced ~10%

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86242

--- Comment #2 from wendy.wang at intel.com ---
Test base on Eero's suggestion, got below compare result on BDW GT2 E2:
parents of bad commit    FPS    after of bad commit     FPS   
(Before-After)/Before
doom3 50.1    50.1    doom3 49.5    49.5    1.37%
etqw_1_10 36.5    36.5    etqw_1_10 36.0    36    0.90%
etqw-demo 33.2    33.2    etqw-demo 32.9    32.9    0.78%
lightsmark 124.85    124.85    lightsmark 123.87    123.87    1.67%
openarena 35.9    35.9    openarena 35.3    35.3    2.83%
padman 151.9    151.9    padman 147.6    147.6    -1.16%
smokin-guns 129.5    129.5    smokin-guns 131.0    131    0.52%
urbanterror 96.9    96.9    urbanterror 96.4    96.4    1.58%
warsow01 126.7    126.7    warsow01 124.7    124.7    1.23%
xonotic07 166.31    166.31    xonotic07 164.26    164.26    -0.22%
cs 77.34    77.34    cs 77.51    77.51    -1.04%
tf2 44.17    44.17    tf2 44.63    44.63    -1.33%
hl2 88.55    88.55    hl2 89.73    89.73    0.08%
portal 63.48    63.48    portal 63.43    63.43    1.62%
unigine-heaven_4_0 6.18    6.18    unigine-heaven_4_0 6.08    6.08    8.27%
unigine-vally_1_0 5.44    5.44    unigine-vally_1_0 4.99    4.99    8.27%


Bad commit:
 commit 7423cc891b4d6fcc63bfeb79cc1d711ce81122bd
Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Wed Oct 22 08:58:58 2014 -0700

    i965: Implement the PMA stall fix.

Parents of bad commit: 
commit 8ccf54ab098032da4652b314761c04f7724a7277
Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Wed Oct 22 08:58:57 2014 -0700

    i965: Add #defines for Broadwell HiZ workarounds in CACHE_MODE_1.

    This patch adds macros needed for the HiZ PMA stall optimization.

Signed-off-by: Kenneth Graunke kenneth at whitecape.org


After bad commit:
commit 6107557f8fa34e0b7191813792be43eaa03aed19
Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Wed Oct 22 08:58:59 2014 -0700

    i965: Re-enable Z16 on Gen8+.

    Improves performance in GLBenchmark 2.7 TRex by 3.88889% +/- 0.336383%
    (n=80) at 1280x720 on Broadwell GT3.  Together with the previous patch,
    it improves performance by 5.42738% +/- 0.541971% (n=10) at 1920x1080.

    Note that without the PMA stall fix, this would instead decrease
    performance by 22%.

    v2: Update comment (noticed by Kristian Høgsberg).

Signed-off-by: Kenneth Graunke kenneth at whitecape.org


Fixed other gfx sw driver to below list 2014-11-17 
Libdrm:       
(master)libdrm-2.4.58-4-g00847fa48b83a85b0cb882594a12ed1511f780db
 Xserver:       
(master)xorg-server-1.16.99.901-3-g63bb5c5ef16edf652179770294dcca4fc07dc992
 Xf86_video_intel:       
(master)2.99.916-145-g6c2707d7bbc0ebb422be66618b6f78887c46446e
 Cairo:        (master)121f384c0e231c9c5d9c937b216d342bfc7810a6
 Libva:        (master)f9309a6f44b51bb2c463a6a16d3ccf3edc6e6c7a
 Libva_intel_driver:        (master)8e34fb34ed402811e512f9d41b14345f3795bac5
 Kernel:   (drm-intel-nightly)e49ebf9ed863e9522260ebd7bd0338ef5641c0e6

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