ANV Enables UBO Pushing For Another Extra Bit Of Performance
Written by Michael Larabel in Intel on 9 December 2017 at 08:17 AM EST. 4 Comments
INTEL --
With just seven lines of new code, Intel's ANV Vulkan driver is a few percent faster in some Linux games.

Jason Ekstrand of Intel landed support for UBO (Uniform Buffer Object) pushing. He explained in the commit, "Push constants on Intel hardware are significantly more performant than pull constants. Since most Vulkan applications don't actively use push constants on Vulkan or at least don't use it heavily, we're pulling way more than we should be. By enabling pushing chunks of UBOs we can get rid of a lot of those pulls."

On a Skylake GT4e system, he found that enabling the UBO pushing yielded around a 2.5% boost in performance for Dota 2 and Talos while the Aztec Ruins was up by about 2%, not bad for the small patch.
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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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