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As a result of this patch, compiler chooses SIMD32 shaders more frequently. Current logic is designed to avoid regressions from enabling SIMD32 at all cost, even though the cases where regression can happen are probably for smaller draw calls (far away from the camera and though smaller). In Intel perf CI this patch improves FPS in: - gfxbench5 alu2: 21.92% (gen9), 23.7% (gen11) - synmark OglShMapVsm: 3.26% (gen9), 4.52% (gen11) - gfxbench5 car chase: 1.34% (gen9), 1.32% (gen11) No observed regressions there. In my testing, it also improves FPS in: - The Talos Principle: 2.9% (gen9) The other 16 games I tested had very minor changes in performance (2/3 positive, but not significant enough to list here). Note: this patch harms synmark OglDrvState (which is not in Intel perf CI) by ~2.9%, but this benchmark renders multiple scenes from other workloads (including OglShMapVsm, which is helped in standalone mode) in tiny rectangles. Rendering so small drastically changes branching statistics, which favors smaller SIMD modes. I assume this matters only in micro-benchmarks, as in real workloads more expensive (with more uniform branching behavior) draw calls dominate. Signed-off-by: Marcin Ślusarz <marcin.slusarz@intel.com> Acked-by: Francisco Jerez <currojerez@riseup.net> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7137> |
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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.