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read-only mirror of https://gitlab.freedesktop.org/mesa/mesa
5cf41d4d47
Avoids theoretical race condition when presentation complete is signaled even before GPU is done. This can happen on native X11 in windowed mode when GPU is heavily loaded. In this world, COMPLETE may be called even before the GPU is done rendering the frame, meaning that the timestamp command buffer has not been written yet. Relying on queue commands to reset the timestamp query would be problematic, because by the time the timestamp is queried in COMPLETE callback, we will actually see the timestamp of the previous present that used a particular image, which leads to GPU completion time that happened far in the past. To avoid this situation, we can reset the query early on the host. This way, if GPU is not done rendering by the time COMPLETION callback is sent, we will observe a NOT_READY result instead. Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no> Reviewed-by: Mario Kleiner <mario.kleiner.de@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39551> |
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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.