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read-only mirror of https://gitlab.freedesktop.org/mesa/mesa
9a48b1bdb2
Texture descriptors currently waste a massive ammount of memory, as every one is allocated via a separate BO. As the allocation granularity of the kernel is 4KB and the descriptor is only 256B, 93.75% of the allocated memory is wasted. Add a simple suballocator for the texture descriptors, to allocate multiple ones out of a single kernel BO. This isn't perfect, as freed slots in the suballocated resource are not reused, but worst-case we end up with the same waste as we had before. This also potentially improves efficiency at the kernel side, as this reduces the number of BOs needed for the sampler views in each submit. As the BO is now used by multiple descriptors, avoid syncing with the GPU via the cpu_prep/fini calls, as to not introduce stalls between pending rendering and new descriptors being filled. This is safe, as each suballocation slot is only used once, so newly filled slots are certainly not in use by the GPU. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de> Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17448> |
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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://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.