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535caaf3e0
This adds optimizations for iadd, fadd, and ixor with reduce, inclusive scan, and exclusive scan. NOTE: The fadd and ixor optimizations had no shader-db or fossil-db changes on any Intel platform. NOTE 2: This change "fixes" arb_compute_variable_group_size-local-size and base-local-size.shader_test on DG2 and MTL. This is just changing the code path taken to not use whatever path was not working properly before. This is a subset of the things optimized by ACO. See also https://gitlab.freedesktop.org/mesa/mesa/-/issues/3731#note_682802. The min, max, iand, and ior exclusive_scan optimizations are not implemented. Broadwell on shader-db is not happy. I have not investigated. v2: Silence some warnings about discarding const. v3: Rename mbcnt to count_active_invocations. Add a big comment explaining the differences between the two paths. Suggested by Rhys. shader-db: All Gfx9 and newer platforms had similar results. (Ice Lake shown) total instructions in shared programs: 20300384 -> 20299545 (<.01%) instructions in affected programs: 19167 -> 18328 (-4.38%) helped: 35 / HURT: 0 total cycles in shared programs: 842809750 -> 842766381 (<.01%) cycles in affected programs: 2160249 -> 2116880 (-2.01%) helped: 33 / HURT: 2 total spills in shared programs: 4632 -> 4626 (-0.13%) spills in affected programs: 206 -> 200 (-2.91%) helped: 3 / HURT: 0 total fills in shared programs: 5594 -> 5581 (-0.23%) fills in affected programs: 664 -> 651 (-1.96%) helped: 3 / HURT: 1 fossil-db results: All Intel platforms had similar results. (Ice Lake shown) Totals: Instrs: 165551893 -> 165513303 (-0.02%) Cycles: 15132539132 -> 15125314947 (-0.05%); split: -0.05%, +0.00% Spill count: 45258 -> 45204 (-0.12%) Fill count: 74286 -> 74157 (-0.17%) Scratch Memory Size: 2467840 -> 2451456 (-0.66%) Totals from 712 (0.11% of 656120) affected shaders: Instrs: 598931 -> 560341 (-6.44%) Cycles: 184650167 -> 177425982 (-3.91%); split: -3.95%, +0.04% Spill count: 983 -> 929 (-5.49%) Fill count: 2274 -> 2145 (-5.67%) Scratch Memory Size: 52224 -> 35840 (-31.37%) Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27044> |
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`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.rst <https://mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.rst <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 `OFTC's #dri-devel <irc://irc.oftc.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.rst <https://mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.rst <https://mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.