RADV Vulkan Driver Gets Minor CPU Overhead Reductions, Conditional Rendering Patches
Written by Michael Larabel in Radeon on 9 July 2018 at 08:22 AM EDT. Add A Comment
RADEON --
Samuel Pitoiset of Valve's open-source Linux GPU driver team has been particularly busy in recent days with "RADV" Radeon Vulkan driver enhancements.

Pitoiset this weekend sent out patches for enabling the new VK_KHR_create_renderpass2 extension, which was introduced in Saturday's release of Vulkan 1.1.80. RenderPass2 allows for render passes to be easily extended.

Now this morning across 4 patches are support for conditional rendering, another new extension of Vulkan 1.1.80, that allows making rendering to be conditional based upon a value in buffer memory and to otherwise discard the subsequent rendering commands, to avoid having to stall the rendering to wait on the application/engine. This support is exposed by the new VK_EXT_conditional_rendering extension.

Meanwhile, hitting Mesa 18.2 Git today are some CPU overhead reductions in the form of lower overhead when flushing descriptors and possibly lower CPU overhead when using RADV_TRACE_FILE.

Great work all around thanks to Valve, AMD, and other stakeholders.
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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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