RADV Vulkan Squeezes A Bit More Performance Out Of Mad Max
Written by Michael Larabel in Radeon on 4 October 2017 at 06:07 AM EDT. 12 Comments
RADEON --
David Airlie has managed to squeeze a bit more performance out of Feral Interactive's Mad Max Vulkan port with one line of code change to RADV.

Airlie changed RADV's NIR to LLVM conversion pass from using FMA to the FMULADD intrinsic. In doing so, with the Phoronix Test Suite's Mad Max test when running at 4K with high settings he found some minor improvements in the different scenes.

The boosts go from around 55 to 60 FPS, 46 to 50 FPS, and 55 to 60 FPS. While just a few frames, it does push it closer to a 60 FPS average for 4K gaming with Mad Max on RADV. This small patch is also being queued for backporting to Mesa 17.2 for those not riding 17.3-devel Git.
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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 10,000 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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