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4689e98fe8
For IMMEDIATE and FIFO, most games work in a pipelined manner where the can produce frames at a rate of 1/MAX(CPU duration, GPU duration), but the render latency is CPU duration + GPU duration. This means that with scanout from pageflipping we need 3 frames to run full speed: 1) CPU rendering work 2) GPU rendering work 3) scanout Once we have a nonblocking acquire that returns a semaphore we can merge 1 and 3. Hence the ideal implementation needs only 2 images, but games cannot tellwe currently do not have an ideal implementation and that hence they need to allocate 3 images. So let us do it for them. This is a tradeoff as it uses more memory than needed for non-fullscreen and non-performance intensive applications. Since this is pretty much a TODO that can use the context I added this as a comment. Acked-by: Jason Ekstrand <jason@jlekstrand.net> Acked-by: Samuel Pitoiset <samuel.pitoiset@gmail.com> |
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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.