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read-only mirror of https://gitlab.freedesktop.org/mesa/mesa
3936a43496
Reduce the cycle-count cost estimate used by the performance model for render target writes on xe3+ in order to match the real-world observation of shaders with latency lower than the previously estimated cost of its render target write. In a shader used by Factorio this would have led us to incorrectly model the shader as fillrate-bound, even though in reality the shader is EU-bound and benefits from the higher parallelism of SIMD32, so the subsequent commit that re-enables the static analysis-based SIMD32 heuristic on PTL would lead to a ~2% regression without this tweak. There appear to be no other regressions nor other changes from this in combination with the subsequent commit that enables it to have an effect, but it is possible that the real cycle count cost of a render target write still lies below the estimated value, ~400 is just the upper bound that can be inferred from the behavior of this test case. Acked-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36618> |
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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://docs.mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.rst <https://docs.mesa3d.org/meson.html>`_): .. code-block:: sh $ meson setup build $ ninja -C build/ $ sudo ninja -C build/ 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://docs.mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.rst <https://docs.mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.