Ian Romanick
d40640efe8
I have not investigated the result of doing this during code generation. That should be possible, but it would be a bit more effort. All Gen6+ platforms had nearly identical results. (Skylake shown) total cycles in shared programs: 370961508 -> 370961367 (<.01%) cycles in affected programs: 5174 -> 5033 (-2.73%) helped: 2 HURT: 0 Iron Lake and GM45 had similar results. (Iron Lake shown) total instructions in shared programs: 8206587 -> 8206589 (<.01%) instructions in affected programs: 1325 -> 1327 (0.15%) helped: 0 HURT: 2 total cycles in shared programs: 187657422 -> 187657428 (<.01%) cycles in affected programs: 11566 -> 11572 (0.05%) helped: 0 HURT: 2 This change has almost no effect right now. However, removing this patch (but leaving the patch "intel/fs: Generate if instructions with inverted conditions") after adding a patch that removes !(a < b) -> (a >= b) optimizations (like https://patchwork.freedesktop.org/patch/264787/) has the following results on Skylake: Skylake total instructions in shared programs: 15071804 -> 15071806 (<.01%) instructions in affected programs: 640 -> 642 (0.31%) helped: 0 HURT: 2 total cycles in shared programs: 369914348 -> 369916569 (<.01%) cycles in affected programs: 27900 -> 30121 (7.96%) helped: 4 HURT: 15 helped stats (abs) min: 2 max: 112 x̄: 30.00 x̃: 3 helped stats (rel) min: 0.28% max: 12.28% x̄: 3.34% x̃: 0.40% HURT stats (abs) min: 2 max: 758 x̄: 156.07 x̃: 81 HURT stats (rel) min: 0.20% max: 74.30% x̄: 16.29% x̃: 16.91% 95% mean confidence interval for cycles value: 12.68 221.11 95% mean confidence interval for cycles %-change: 3.09% 21.23% Cycles are HURT. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
`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.