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Sandy Bridge is the big winner because it lies at something of a crossroads. It supports a fairly high OpenGL version, and it still has the old style math box. The high OpenGL version means a lot more shaders can run on it. The old style math box means extra moves are necessary to resolve source modifiers on operands to complex math instructions like COS, SQRT, and RCP. v2: Remove a couple patterns that are now redundant. All Gen7+ platforms had similar results. (Ice Lake shown) total instructions in shared programs: 16282006 -> 16278207 (-0.02%) instructions in affected programs: 174555 -> 170756 (-2.18%) helped: 661 HURT: 0 helped stats (abs) min: 1 max: 36 x̄: 5.75 x̃: 3 helped stats (rel) min: 0.06% max: 23.68% x̄: 2.81% x̃: 1.94% 95% mean confidence interval for instructions value: -6.16 -5.34 95% mean confidence interval for instructions %-change: -3.02% -2.60% Instructions are helped. total cycles in shared programs: 367168597 -> 367134284 (<.01%) cycles in affected programs: 1105276 -> 1070963 (-3.10%) helped: 460 HURT: 150 helped stats (abs) min: 1 max: 568 x̄: 96.60 x̃: 82 helped stats (rel) min: 0.02% max: 32.50% x̄: 7.99% x̃: 4.27% HURT stats (abs) min: 1 max: 901 x̄: 67.49 x̃: 39 HURT stats (rel) min: 0.07% max: 20.00% x̄: 4.90% x̃: 4.22% 95% mean confidence interval for cycles value: -65.68 -46.82 95% mean confidence interval for cycles %-change: -5.59% -4.05% Cycles are helped. Sandy Bridge total instructions in shared programs: 10824272 -> 10802557 (-0.20%) instructions in affected programs: 1237988 -> 1216273 (-1.75%) helped: 8199 HURT: 0 helped stats (abs) min: 1 max: 41 x̄: 2.65 x̃: 2 helped stats (rel) min: 0.12% max: 20.00% x̄: 2.04% x̃: 1.73% 95% mean confidence interval for instructions value: -2.70 -2.59 95% mean confidence interval for instructions %-change: -2.07% -2.00% Instructions are helped. total cycles in shared programs: 154009894 -> 153843598 (-0.11%) cycles in affected programs: 10650486 -> 10484190 (-1.56%) helped: 4973 HURT: 1533 helped stats (abs) min: 1 max: 3904 x̄: 40.20 x̃: 20 helped stats (rel) min: 0.02% max: 41.72% x̄: 2.63% x̃: 1.67% HURT stats (abs) min: 1 max: 453 x̄: 21.94 x̃: 8 HURT stats (rel) min: 0.02% max: 41.91% x̄: 1.54% x̃: 0.58% 95% mean confidence interval for cycles value: -28.02 -23.10 95% mean confidence interval for cycles %-change: -1.74% -1.56% Cycles are helped. LOST: 0 GAINED: 2 GM45 and Iron Lake had similar results. (Iron Lake shown) total instructions in shared programs: 8135196 -> 8134888 (<.01%) instructions in affected programs: 31920 -> 31612 (-0.96%) helped: 169 HURT: 0 helped stats (abs) min: 1 max: 12 x̄: 1.82 x̃: 2 helped stats (rel) min: 0.43% max: 3.23% x̄: 1.23% x̃: 1.16% 95% mean confidence interval for instructions value: -2.01 -1.64 95% mean confidence interval for instructions %-change: -1.32% -1.15% Instructions are helped. total cycles in shared programs: 188575724 -> 188574092 (<.01%) cycles in affected programs: 406840 -> 405208 (-0.40%) helped: 169 HURT: 0 helped stats (abs) min: 4 max: 72 x̄: 9.66 x̃: 10 helped stats (rel) min: 0.07% max: 2.16% x̄: 0.57% x̃: 0.47% 95% mean confidence interval for cycles value: -10.72 -8.59 95% mean confidence interval for cycles %-change: -0.63% -0.50% Cycles are helped. Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com> |
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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 email mailing-lists for patches submission, review and discussions.