Linux Work on Graphics by Intel
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Intel Graphics Compiler Changes For Gen12 - Biggest Changes To The ISA Since i965
Since June Intel's open-source developers have begun volleying the initial open-source graphics driver code for Tigerlake "Gen12" hardware. To date the Gen12 changes haven't been too invasive even with this being the first generation with the "Xe Graphics" engine branding. But that's now changed with a new patch series showing major changes to the graphics instruction set.
Now that the Intel open-source developers have begun preparing the changes for their graphics compiler back-end for Xe/Gen12 initially with Tigerlake processors, the major architectural changes are beginning to show compared to Icelake "Gen11" graphics and older. The patches show that the Gen12 graphics ISA is one of the biggest reworks ever to the Intel EU ISA since the original i965 graphics a decade ago.
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Intel Linux Graphics Stack Gets Another Speed Boost - Helping Civilization VI By ~18%
Intel's open-source Linux graphics driver crew has been on an exciting spree lately of not only punctually enabling new hardware support but also pushing some big performance improvements for new and existing generations of graphics hardware. Today another performance achievement was unlocked.
Kenneth Graunke who led the development of their new Gallium3D OpenGL driver discovered an optimization today that not only benefits that "iris" driver but also the i965 classic OpenGL driver and their ANV Vulkan driver. The optimization is to stop redirecting the state cache to the command stream command buffer cache section. By looking through their hardware documentation and comparing the behavior to the Intel Windows driver, this optimization was uncovered.
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