Mesa 23.1 RadeonSI Enables Rusticl OpenCL Support

Written by Michael Larabel in Mesa on 12 April 2023 at 07:02 AM EDT. 29 Comments
If Mesa 23.1 couldn't get anymore exciting with RADV GPL support enabled by default, more RDNA3 optimizations, continued Zink optimizations, more Intel DG2/Alchemist enhancements, and a load of other features... Support for RadeonSI with the Rusticl Rust-written OpenCL driver has been merged!

The half-year-old merge request by Red Hat's Karol Herbst, who has led Rusticl development, to enable Rusticl support for RadeonSI has finally been merged to Git for Mesa 23.1.

This follows other Rusticl and RadeonSI improvements recently and with the final three patches merged yesterday push the support over the finish line.

RadeonSI Rusticl Merged

With this quarter's Mesa 23.1 release is now this nice and modern OpenCL support working for RadeonSI as an alternative to using the ROCm OpenCL stack or the aging and not too useful "Clover" Gallium3D OpenCL driver. I'll be running some RadeonSI Rusticl OpenCL benchmarks soon for seeing how well this support plays out. Benchmarks previously carried out by Karol have indicated Rusticl outperforming ROCm OpenCL at the time.

Going the Rusticl route should also be much easier for running open-source Radeon OpenCL on non-enterprise Linux distributions where ROCm isn't officially certified/tested.
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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

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