[Bug 90113] [HSW Bisected] OglDrvShComp_6 performance decreased by 10-20%.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90113

Ding Heng <hengx.ding at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #3 from Ding Heng <hengx.ding at intel.com> ---
(In reply to Eero Tamminen from comment #2)
> Heng, is the given 10-20% shader compiler slowdown only from "i965: Don't
> set NirOptions for stages that will use the vec4 backend" commit, or total
> speed difference for larger set of changes?

Sorry for incorrect bisect result:


d47405eb707b9921f70454049677a9d504ee3fa6 is the first bad commit
commit d47405eb707b9921f70454049677a9d504ee3fa6
Author: Jason Ekstrand <jason.ekstrand at intel.com>
Date:   Fri Apr 10 16:24:11 2015 -0700

    i965: Use NIR by default for fragment shaders

    GLSL IR vs. NIR shader-db results on i965:

       total instructions in shared programs: 2889747 -> 2890782 (0.04%)
       instructions in affected programs:     2425446 -> 2426481 (0.04%)
       helped:                                3698
       HURT:                                  5341

    GLSL IR vs. NIR shader-db results on g4x:

       total instructions in shared programs: 2547252 -> 2550440 (0.13%)
       instructions in affected programs:     1984482 -> 1987670 (0.16%)
       helped:                                2844
       HURT:                                  4776

    GLSL IR vs. NIR shader-db results on Iron Lake:

       total instructions in shared programs: 4053381 -> 4063828 (0.26%)
       instructions in affected programs:     3026601 -> 3037048 (0.35%)
       helped:                                4110
       HURT:                                  8331
       GAINED:                                1287
       LOST:                                  9

    GLSL IR vs. NIR shader-db results on Sandy Bridge:

       total instructions in shared programs: 5307041 -> 5236666 (-1.33%)
       instructions in affected programs:     3442908 -> 3372533 (-2.04%)
       helped:                                11829
       HURT:                                  5604
       GAINED:                                33
       LOST:                                  18

    GLSL IR vs. NIR shader-db results on Ivy Bridge:

       total instructions in shared programs: 4926333 -> 4857017 (-1.41%)
       instructions in affected programs:     3144042 -> 3074726 (-2.20%)
       helped:                                11559
       HURT:                                  4774
       GAINED:                                46
       LOST:                                  25

    GLSL IR vs. NIR shader-db results on Bay Trail:

       total instructions in shared programs: 4926333 -> 4857017 (-1.41%)
       instructions in affected programs:     3144042 -> 3074726 (-2.20%)
       helped:                                11559
       HURT:                                  4774
       GAINED:                                46
       LOST:                                  25

    GLSL IR vs. NIR shader-db results on Haswell:

       total instructions in shared programs: 4392487 -> 4293476 (-2.25%)
       instructions in affected programs:     2800180 -> 2701169 (-3.54%)
       helped:                                13073
       HURT:                                  3383
       GAINED:                                46
       LOST:                                  23

    GLSL IR vs. NIR shader-db results on Broadwell (FS only):

       total instructions in shared programs: 4378113 -> 4283025 (-2.17%)
       instructions in affected programs:     2743209 -> 2648121 (-3.47%)
       helped:                                12470
       HURT:                                  3609
       GAINED:                                64
       LOST:                                  27

    Signed-off-by: Jason Ekstrand <jason.ekstrand at intel.com>
    Acked-by: Matt Turner <mattst88 at gmail.com>
    Acked-by: Kenneth Graunke <kenneth at whitecape.org>

:040000 040000 056467d1b76d9b6d84041be3994abf5acc976caf
450c58fbecf671fef84ed91ca5999432e024a19d M   src

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