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read-only mirror of https://gitlab.freedesktop.org/mesa/mesa
f8bda81887
In order to set up KILL sets, the dataflow code was walking the entire array of ACPs for every instruction. If you assume the number of ACPs increases roughly with the number of instructions, this is O(n^2). As it turns out, regions_overlap() is not nearly as cheap as one would like and shows up as a significant chunk on perf traces. This commit changes things around and instead first builds an array of exec_lists which it uses like a hash table (keyed off ACP source or destination) similar to what's done in the rest of the copy-prop code. By first walking the list of ACPs and populating the table and then walking instructions and only looking at ACPs which probably have the same VGRF number, we can reduce the complexity to O(n). This takes the execution time of the piglit vs-isnan-dvec test from about 56.4 seconds on an unoptimized debug build (what we run in CI) with NIR_VALIDATE=0 to about 38.7 seconds. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Matt Turner <mattst88@gmail.com> |
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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.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.