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Ian Romanick 6cd88f51f3 intel/fs: Don't count integer instructions as being possibly coissue 
Integer instructions don't coissue.  Before e64be391dd
("intel/compiler: generalize the combine constants pass"), this pass
only looked at float sources.  There's no shader-db data in that commit,
so I collected some.  The results are not good:

    Haswell
    total instructions in shared programs: 11898805 -> 11908127 (0.08%)
    instructions in affected programs: 1218680 -> 1228002 (0.76%)
    helped: 2
    HURT: 5171
    helped stats (abs) min: 12 max: 111 x̄: 61.50 x̃: 61
    helped stats (rel) min: 1.59% max: 9.20% x̄: 5.40% x̃: 5.40%
    HURT stats (abs)   min: 1 max: 311 x̄: 1.83 x̃: 1
    HURT stats (rel)   min: 0.02% max: 9.91% x̄: 1.05% x̃: 0.70%
    95% mean confidence interval for instructions value: 1.55 2.05
    95% mean confidence interval for instructions %-change: 1.02% 1.08%
    Instructions are HURT.

    total cycles in shared programs: 221664974 -> 221404750 (-0.12%)
    cycles in affected programs: 120012620 -> 119752396 (-0.22%)
    helped: 3464
    HURT: 3159
    helped stats (abs) min: 1 max: 428160 x̄: 314.55 x̃: 16
    helped stats (rel) min: <.01% max: 57.33% x̄: 3.40% x̃: 1.28%
    HURT stats (abs)   min: 1 max: 87846 x̄: 262.54 x̃: 14
    HURT stats (rel)   min: <.01% max: 85.57% x̄: 3.01% x̃: 0.77%
    95% mean confidence interval for cycles value: -224.23 145.65
    95% mean confidence interval for cycles %-change: -0.50% -0.19%
    Inconclusive result (value mean confidence interval includes 0).

    total spills in shared programs: 9804 -> 10047 (2.48%)
    spills in affected programs: 6869 -> 7112 (3.54%)
    helped: 2
    HURT: 41

    total fills in shared programs: 19863 -> 20319 (2.30%)
    fills in affected programs: 17428 -> 17884 (2.62%)
    helped: 2
    HURT: 41

    LOST:   20
    GAINED: 13

This also prevents regressions in "intel/fs: Promote integer constants
after lowering integer multiplication" (note: that patch will probably
not be committed).  When the passes are reorderd, code like

    mul(8)      acc0<1>D    g9<8,8,1>D  -2078209981D    { align1 1Q };

gets turned into

    mov(1)      g23<1>D     2078209981D                 { align1 WE_all 1N };
    ...
    mul(8)      acc0<1>D    g13<8,8,1>D  -g23<0,1,0>D   { align1 1Q compacted };

It's not 100% clear why, but these produce different results.  Note that
-2078209981 & 0x0ffff = 0x0843, and -(2078209981 & 0x0ffff) =
0xffff0843.  It seems like the upper 16-bits of the negation should be
ignored.

Fixes: e64be391dd ("intel/compiler: generalize the combine constants pass")
Cc: Iago Toral Quiroga <itoral@igalia.com>
Suggested-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>

The shaders with spills or fills hurt are the usual suspects.  A couple
compute shaders in Dirt Showdown and a compute shader in Bioshock
Infinite.  On Haswell, a compute shader (that appears twice in
shader-db) from Aztec Ruins was also hurt for spill and fills.

Haswell
total instructions in shared programs: 11573934 -> 11568335 (-0.05%)
instructions in affected programs: 828623 -> 823024 (-0.68%)
helped: 2825
HURT: 6
helped stats (abs) min: 1 max: 134 x̄: 2.16 x̃: 1
helped stats (rel) min: 0.02% max: 9.05% x̄: 0.84% x̃: 0.61%
HURT stats (abs)   min: 1 max: 216 x̄: 81.83 x̃: 56
HURT stats (rel)   min: 0.16% max: 8.65% x̄: 4.21% x̃: 4.68%
95% mean confidence interval for instructions value: -2.31 -1.64
95% mean confidence interval for instructions %-change: -0.85% -0.80%
Instructions are helped.

total cycles in shared programs: 187573593 -> 187004633 (-0.30%)
cycles in affected programs: 82816107 -> 82247147 (-0.69%)
helped: 2186
HURT: 1741
helped stats (abs) min: 1 max: 35230 x̄: 326.96 x̃: 16
helped stats (rel) min: <.01% max: 46.11% x̄: 3.11% x̃: 0.90%
HURT stats (abs)   min: 1 max: 6138 x̄: 83.73 x̃: 16
HURT stats (rel)   min: <.01% max: 104.11% x̄: 2.73% x̃: 0.75%
95% mean confidence interval for cycles value: -197.13 -92.64
95% mean confidence interval for cycles %-change: -0.72% -0.33%
Cycles are helped.

total spills in shared programs: 7870 -> 7743 (-1.61%)
spills in affected programs: 2260 -> 2133 (-5.62%)
helped: 31
HURT: 5

total fills in shared programs: 6320 -> 6263 (-0.90%)
fills in affected programs: 3547 -> 3490 (-1.61%)
helped: 31
HURT: 6

LOST:   9
GAINED: 9

Ivybridge
total instructions in shared programs: 11863372 -> 11859793 (-0.03%)
instructions in affected programs: 757183 -> 753604 (-0.47%)
helped: 2236
HURT: 3
helped stats (abs) min: 1 max: 81 x̄: 1.86 x̃: 1
helped stats (rel) min: 0.03% max: 5.26% x̄: 0.74% x̃: 0.48%
HURT stats (abs)   min: 11 max: 301 x̄: 192.33 x̃: 265
HURT stats (rel)   min: 1.55% max: 10.51% x̄: 6.89% x̃: 8.62%
95% mean confidence interval for instructions value: -2.01 -1.18
95% mean confidence interval for instructions %-change: -0.77% -0.70%
Instructions are helped.

total cycles in shared programs: 178377378 -> 177946087 (-0.24%)
cycles in affected programs: 76261390 -> 75830099 (-0.57%)
helped: 1635
HURT: 1395
helped stats (abs) min: 1 max: 34796 x̄: 333.53 x̃: 16
helped stats (rel) min: <.01% max: 47.15% x̄: 2.82% x̃: 0.64%
HURT stats (abs)   min: 1 max: 4315 x̄: 81.74 x̃: 18
HURT stats (rel)   min: <.01% max: 49.98% x̄: 1.99% x̃: 0.53%
95% mean confidence interval for cycles value: -197.06 -87.62
95% mean confidence interval for cycles %-change: -0.78% -0.43%
Cycles are helped.

total spills in shared programs: 4188 -> 4182 (-0.14%)
spills in affected programs: 1557 -> 1551 (-0.39%)
helped: 30
HURT: 3

total fills in shared programs: 5056 -> 5245 (3.74%)
fills in affected programs: 2708 -> 2897 (6.98%)
helped: 30
HURT: 3

LOST:   5
GAINED: 1

No shader-db changes on any other Intel platform.

Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3544>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3544>
(cherry picked from commit 59488cbbac)
2020-02-05 08:52:34 -08:00
.appveyor Appveyor/Meson: Add build test of osmesa gallium 2019-10-19 14:44:44 +00:00
.gitlab-ci gitlab-ci: Update required libdrm version 2019-10-29 09:50:09 +00:00
bin bin/pick-ui: Add a new maintainer script for picking patches 2020-02-03 08:31:35 -08:00
build-support configure: commit test files 2017-10-16 16:32:43 -07:00
docs docs: Add SHA 256 sums for 19.3.3 2020-01-28 11:32:51 -08:00
doxygen doxygen: Plumb through gallium/ to automated documentation 2016-05-30 17:53:45 +01:00
include dri: add __DRI_IMAGE_FORMAT_SXRGB8 2019-12-17 09:21:06 -08:00
scons scons/windows: Fix build with LLVM>=8 2019-10-04 13:48:08 +00:00
src intel/fs: Don't count integer instructions as being possibly coissue 2020-02-05 08:52:34 -08:00
subprojects meson: use github URL for wraps instead of completely unreliable wrapdb 2020-01-28 08:54:24 -08:00
.dir-locals.el dir-locals.el: Adds White Space support 2016-11-14 19:17:49 +02:00
.editorconfig editorconfig: Fix meson style 2019-05-24 18:44:18 +00:00
.gitignore intel/tools: Add unit tests for assembler 2019-05-07 14:33:48 -07:00
.gitlab-ci.yml gitlab-ci: Disable meson-windows job for the time being 2019-10-30 09:38:20 +01:00
.mailmap .mailmap: add a couple of aliases for Jakob Bornecrantz 2019-10-03 17:11:20 -04:00
.pick_status.json intel/fs: Don't count integer instructions as being possibly coissue 2020-02-05 08:52:34 -08:00
.travis.yml travis: fix scons build after deprecation warning 2019-10-29 09:25:40 +00:00
Android.common.mk docs: Update bug report URLs for the gitlab migration 2019-09-19 16:37:36 +00:00
Android.mk Android.mk: Fix missing \ from recent llvm change 2019-09-13 19:11:10 +00:00
appveyor.yml appveyor: Move appveyor script into .appveyor directory 2019-10-18 13:02:58 -07:00
CleanSpec.mk CleanSpec.mk: Remove HOST_OUT_release 2018-08-02 15:42:40 -06:00
common.py scons: Print a deprecation warning about using scons on not windows 2019-10-24 18:33:50 +00:00
meson.build meson: Do not require libdrm for DRI2 on hurd 2020-01-28 08:54:25 -08:00
meson_options.txt zink: introduce opengl over vulkan 2019-10-28 08:51:43 +00:00
README.rst README: Drop the badges from the readme 2019-02-07 12:46:17 -06:00
REVIEWERS REVIEWERS: add VMware reviewers 2019-10-18 16:42:40 +00:00
SConstruct scons: Fix force_scons parsing. 2019-10-26 08:23:48 +01:00
VERSION VERSION: bump version to 19.3.3 2020-01-28 11:06:26 -08:00

README.rst 

`Mesa <https://mesa3d.org>`_ - The 3D Graphics Library
======================================================


Source
------

This repository lives at https://gitlab.freedesktop.org/mesa/mesa.
Other repositories are likely forks, and code found there is not supported.


Build & install
---------------

You can find more information in our documentation (`docs/install.html
<https://mesa3d.org/install.html>`_), but the recommended way is to use
Meson (`docs/meson.html <https://mesa3d.org/meson.html>`_):

.. code-block:: sh

  $ mkdir build
  $ cd build
  $ meson ..
  $ sudo ninja install


Support
-------

Many Mesa devs hang on IRC; if you're not sure which channel is
appropriate, you should ask your question on `Freenode's #dri-devel
<irc://chat.freenode.net#dri-devel>`_, someone will redirect you if
necessary.
Remember that not everyone is in the same timezone as you, so it might
take a while before someone qualified sees your question.
To figure out who you're talking to, or which nick to ping for your
question, check out `Who's Who on IRC
<https://dri.freedesktop.org/wiki/WhosWho/>`_.

The next best option is to ask your question in an email to the
mailing lists: `mesa-dev\@lists.freedesktop.org
<https://lists.freedesktop.org/mailman/listinfo/mesa-dev>`_


Bug reports
-----------

If you think something isn't working properly, please file a bug report
(`docs/bugs.html <https://mesa3d.org/bugs.html>`_).


Contributing
------------

Contributions are welcome, and step-by-step instructions can be found in our
documentation (`docs/submittingpatches.html
<https://mesa3d.org/submittingpatches.html>`_).

Note that Mesa uses email mailing-lists for patches submission, review and
discussions.