Performance-Boosting HiZ Patches Revised For Intel's Vulkan Linux Driver

Written by Michael Larabel in Vulkan on 27 September 2016 at 06:39 AM EDT. 3 Comments
A revised set of 11 patches were published this week for implementing basic HiZ (Hierarchical Z) support within Intel's open-source Vulkan "ANV" Mesa driver.

These patches don't yet enable HiZ for all cases, but currently just for basic ones. With this basic support, enabling rendering to HiZ increases the FPS by about ~15% on basic triangle and multi-sampling demos. When enabling fast depth clears, it's about an additional 30% frame-rate gains for these triangle and multi-sampling Vulkan demos.

These patches are a great start but not until the rest of the HiZ support is squared away will we probably see any significant benefit in the Vulkan Linux games like Dota 2 and Talos Principle.
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Michael Larabel is the principal author of 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 automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

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