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RADV Lands Another Fast Clear Optimization, Helping An Operation 18x

Written by Michael Larabel in Radeon on 19 November 2018 at 02:48 PM EST. 9 Comments

Samuel Pitoiset of Valve's open-source Linux graphics driver team has landed a patch providing another optimization around fast clears for the Radeon "RADV" Vulkan driver within Mesa 19.0.

This latest nearly 300 line patch allows for fast clears on the depth part of a surface or the stencil part when HTILE is enabled. For now though it's only enabled on Vega/GFX9 due to no testing on GFX8 hardware.

For this particular fast clear optimization, clearing the depth aspect on a 4096x4096 D32_SFLOAT_S8_UINT image is about 18x faster.

More details in this commit.

9 Comments

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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, LinkedIn, or contacted via MichaelLarabel.com.