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My benchmarking shows no significant change in cache load times with a single shader cache file vs the existing cache implementation of many small files (tested with my spinning rust HDD). However this new single file cache implementation does reduce the total size on disk used by the shader cache. We have a problem with the existing cache where writing tiny files to disk causes more disk space to be used than is actually needed for the files due to the minimum size required for a file. In pratice this tends to inflate the size of the cache on disk to over 3x larger. There are other advantages of using a single file for shader cache entries such as allowing better removal of cache entries once we hit the max cache size limit (although we don't implement any max cache size handling in this initial implementation). The primary reason for implementing a single file cache for now is to allow better performance and handling by third party applications such as steam that collect and distribute precompiled cache entries. For this reason we also implement a new environment variable MESA_DISK_CACHE_READ_ONLY_FOZ_DBS which allows a user to pass in a path to a number of external read only shader cache dbs. There is an initial limit of 8 dbs that can be passed to mesa like so: MESA_DISK_CACHE_READ_ONLY_FOZ_DBS=/full_path/filename1, ... ,/full_path/filename8 Where the filename represents the cache db and its index file e.g. filename1.foz and filename1_idx.foz Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7725>
`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 `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.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.