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Uniform/work registers are partitioned on a shader-by-shader basis as determined by the compiler. We add a simple heuristic here running before scheduling that prioritizes mitigating spilling at all costs. A more sophisticated heuristic should run *after* scheduling, doing a dry run of the register allocator itself to determine spilling. Fitting this into our current scheduling model is difficult, so while this heuristic does hurt some shaders, overall the results are acceptable: total instructions in shared programs: 50065 -> 38747 (-22.61%) instructions in affected programs: 37187 -> 25869 (-30.44%) helped: 59 HURT: 77 helped stats (abs) min: 1 max: 757 x̄: 198.46 x̃: 151 helped stats (rel) min: 0.48% max: 62.89% x̄: 32.95% x̃: 36.27% HURT stats (abs) min: 1 max: 9 x̄: 5.08 x̃: 6 HURT stats (rel) min: 0.92% max: 14.29% x̄: 6.71% x̃: 4.60% 95% mean confidence interval for instructions value: -111.15 -55.29 95% mean confidence interval for instructions %-change: -14.33% -6.67% Instructions are helped. total bundles in shared programs: 30606 -> 19157 (-37.41%) bundles in affected programs: 23907 -> 12458 (-47.89%) helped: 58 HURT: 74 helped stats (abs) min: 6 max: 757 x̄: 203.09 x̃: 152 helped stats (rel) min: 5.19% max: 77.00% x̄: 49.38% x̃: 53.79% HURT stats (abs) min: 1 max: 9 x̄: 4.46 x̃: 5 HURT stats (rel) min: 1.85% max: 26.32% x̄: 11.70% x̃: 9.57% 95% mean confidence interval for bundles value: -115.46 -58.01 95% mean confidence interval for bundles %-change: -20.87% -9.41% Bundles are helped. total quadwords in shared programs: 31305 -> 32027 (2.31%) quadwords in affected programs: 20471 -> 21193 (3.53%) helped: 0 HURT: 133 HURT stats (abs) min: 1 max: 9 x̄: 5.43 x̃: 5 HURT stats (rel) min: 0.76% max: 15.15% x̄: 5.47% x̃: 4.65% 95% mean confidence interval for quadwords value: 5.00 5.86 95% mean confidence interval for quadwords %-change: 4.85% 6.08% Quadwords are HURT. total registers in shared programs: 2256 -> 2545 (12.81%) registers in affected programs: 708 -> 997 (40.82%) helped: 0 HURT: 95 HURT stats (abs) min: 1 max: 8 x̄: 3.04 x̃: 3 HURT stats (rel) min: 12.50% max: 100.00% x̄: 39.41% x̃: 37.50% 95% mean confidence interval for registers value: 2.64 3.45 95% mean confidence interval for registers %-change: 34.62% 44.19% Registers are HURT. total threads in shared programs: 1776 -> 1709 (-3.77%) threads in affected programs: 134 -> 67 (-50.00%) helped: 0 HURT: 67 HURT stats (abs) min: 1 max: 1 x̄: 1.00 x̃: 1 HURT stats (rel) min: 50.00% max: 50.00% x̄: 50.00% x̃: 50.00% 95% mean confidence interval for threads value: -1.00 -1.00 95% mean confidence interval for threads %-change: -50.00% -50.00% Threads are HURT. total spills in shared programs: 3868 -> 2 (-99.95%) spills in affected programs: 3868 -> 2 (-99.95%) helped: 60 HURT: 0 total fills in shared programs: 6456 -> 4 (-99.94%) fills in affected programs: 6456 -> 4 (-99.94%) helped: 60 HURT: 0 Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3150> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3150> |
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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 gitlab for patches submission, review and discussions.