Yiwei Zhang
0273c9cc03
More considerations and details here: - The seek is a bit lighter than set, since it assumes renderer side resource being immutable. It does affect perf when Venus is still making verbose synchronous calls at runtime (e.g. descriptor set, buffer, device memory, etc). - Seek still requires lock protection as the reply shmem must be immutable before the seek and the followed cmd are committed to the ring. - Removing seek without doing set requires renderer change to always bump the encoder end position according to what the original request is instead of being ad-hoc upon what the host driver tells to write. The overhead and extra complexity there isn't negligible. - Further, removing seek requires each ring to track the prior reply pool shmem in the multi-ring scenario. While the additional host side resource lookup isn't costy as the number of resources is must less than the vk object table. - The nice thing is that we can make shmem pool thead safe to be more easily shared across rings. So we just drop it. Signed-off-by: Yiwei Zhang <zzyiwei@chromium.org> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26179>
`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://mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.rst <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 `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://mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.rst <https://mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.