Testing RADV's Out-of-Order Rasterization Vulkan Performance
Written by Michael Larabel in Radeon on 14 April 2018 at 05:31 PM EDT. 14 Comments
With the RADV Vulkan driver recently landing improvements to its out-of-order rasterization support, I ran some performance benchmarks of this non-default feature to see if it made much of a deal for today's Vulkan Linux games.

The out-of-order rasterization for the RADV driver is not currently enabled by default but requires setting the RADV_PERFTEST=outoforder environment variable. Additionally, not all applications/games will be able to benefit from this feature. In the patch in Mesa Git it cites possible "small performance improvements".

I ran tests of Mesa 18.1-devel as of this week with Linux 4.16.1 stable while using a Radeon RX Vega 64.

Indeed at most, the performance benefits are very small indeed, but every little bit ultimately helps the open-source Linux graphics driver stack.
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Michael Larabel is the principal author of Phoronix.com 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 OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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