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read-only mirror of https://gitlab.freedesktop.org/mesa/mesa
2e55357b33
While I was investigating some task+mesh random GPU hangs in CI, I finally found a sequence that caused a test failure: dEQP-VK.dgc.ext.graphics.mesh.conditional_rendering.general.classic_bind_with_count_buffer_condition_false_with_task_shader dEQP-VK.dgc.ext.graphics.mesh.token_draw_count.monolithic_with_task_shader Executing these two tests in a row caused the second one to always fail (tested on NAVI33). After investigating I figured out that only the DGC GFX IB was predicated (with IB2) and the DGC ACE IB was always running, although without any mesh draws to consume the task output. It seems the hardware is confused if another task+mesh draw is dispatched after that, and this could cause failures or GPU hangs. Fix this by resetting the number of DGC sequences to 0 when conditional rendering is used. This is the only option to emulate conditional rendering with DGC and ACE. This also likely fixes DGC+RT on compute queue. Cc: mesa-stable Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/41939> |
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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.