Freedreno Gallium3D Gets A Performance Boost
Freedreno, the leading open-source ARM graphics driver, has picked up an important performance-boosting feature inside of its Gallium3D driver inside mainline Mesa.
The Freedreno Gallium3D driver now has a hardware binning pass support for the Qualcomm Adreno A3xx graphics processors. This pass filters out non-visible vertices for tiles, thus speeding up performance. Rob Clark, the principal Freedreno developer, says that for OpenGL workloads with lots of vertex loading there can be a 35~45% boost in performane.
This performance enhancement for the reverse-engineered Qualcomm Adreno/Snapdragon graphics driver isn't enabled by default in the new open-source code, but requires setting the "FD_MESA_DEBUG=binning" environment variable.
Rob has also begun implementing support for the Gallium3D HUD within the Freedreno code-base.
These latest Freedreno Gallium3D driver updates were shared via Rob's blog.
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