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f3e004cb56
Late export is theoretically better if used with LATE_ALLOC, but in practice, the early export has an advantage of lower register usage, therefore more concurrent waves. The idea of this commit is that "small" shaders benefit from early primitive export more, due to being able to launch much more waves. Let's consider a NIR shader "small" when it has only 1 block. This yields both better performance, and better stats, than always using late export. Fossil DB on Sienna: Totals from 12807 (8.76% of 146265) affected shaders: VGPRs: 609128 -> 620216 (+1.82%); split: -0.01%, +1.83% SpillSGPRs: 1458 -> 1538 (+5.49%) CodeSize: 37028204 -> 37019320 (-0.02%); split: -0.17%, +0.14% MaxWaves: 282902 -> 278516 (-1.55%) Instrs: 7163142 -> 7162925 (-0.00%); split: -0.18%, +0.18% VClause: 169285 -> 169547 (+0.15%); split: -1.15%, +1.30% SClause: 267373 -> 267151 (-0.08%); split: -0.24%, +0.16% Copies: 446442 -> 444567 (-0.42%); split: -2.68%, +2.26% Branches: 156245 -> 156195 (-0.03%); split: -0.30%, +0.26% PreSGPRs: 434701 -> 447396 (+2.92%) PreVGPRs: 527783 -> 540527 (+2.41%) Signed-off-by: Timur Kristóf <timur.kristof@gmail.com> Reviewed-by: Rhys Perry <pendingchaos02@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10106> |
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| README.rst | ||
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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 `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.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.