a22c5df079
We typically need to wait for a buffer to become ready before mapping, so that we don't write new contents while the host is still using the old contents. However, if we are allowed to discard the contents of the mapped buffer range, then we can avoid waiting by using a staging buffer range which we guarantee to never be busy, copying from the staging buffer range to the target buffer in the host. This commit implements this optimization by utilizing a dedicated u_upload_mgr for the staging buffer. Performance results: Twilight Struggle (Steam/Proton), qemu before: 7 FPS after: 25 FPS glmark2 ubo, qemu before: 38 FPS after: 331 FPS Signed-off-by: Alexandros Frantzis <alexandros.frantzis@collabora.com> Suggested-by: Gurchetan Singh <gurchetansingh@chromium.org> Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
`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.