Mesa RadeonSI Lands Possible Vega/Raven Performance Improvement

Written by Michael Larabel in Mesa on 14 June 2018 at 05:43 AM EDT. 5 Comments
Earlier this month AMD's Marek Olšák posted RadeonSI patches for a scissor workaround affecting GFX9/Vega GPUs including Raven Ridge, which were based upon a RADV driver workaround already merged that helped affected games by up to ~11%. A revised version of that patch is now in Mesa 18.2 Git.

Marek has merged his latest patches that implement the scissor bug workaround without causing a performance drop. The main patch notes, "This might improve performance on Vega10 and Raven."

Unfortunately, nothing more concrete than that, but I'll be firing up some fresh Mesa Git benchmarks with Radeon RX Vega in the next few days. As we've seen in recent benchmarks though, any help for RadeonSI (or RADV) on Vega is much appreciated as there still is more performance to squeeze out of these latest-generation AMD GPUs on the open-source Linux drivers.

Mesa 18.2 is on track to debut as stable in August.
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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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