Zink OpenGL-On-Vulkan Can Finally Render glxgears With Great Speed

Written by Michael Larabel in Mesa on 12 November 2021 at 12:00 AM EST. 22 Comments
While the Zink OpenGL-on-Vulkan code within Mesa is close to OpenGL 4.6 conformant and running many OpenGL games at good performance, it's taken until now to see good performance out of the glxgears benchmark.

It took a long time for glxgears to even render correctly on Zink even when it was on to running various demanding OpenGL Linux games... It was just earlier this year Zink correctly rendered glxgears but was doing so incredibly slow.

Prolific Zink developer Mike Blumenkrantz working for Valve has now addressed that performance bottleneck affecting Zink.

Zink had been going through a very slow process when passing vertices into OpenGL to be drawn as a rectangle for glxgears as it resulted in a slow read-back of the index buffer for each draw call. With this merge request pending for Mesa 22.0-devel, that conversion is happening sooner to avoid the costly fall-back.

Blumenkrantz blogged about the glxgears success and now rather than hitting sub-20 FPS he is hitting well above 3000 FPS for this vintage benchmark / test case.
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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.

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