Performance-Boosting HyperZ Getting Fixed Up For Open-Source Radeon Linux Drivers
Written by Michael Larabel in Radeon on 10 December 2015 at 08:47 AM EST. 14 Comments
RADEON --
HyperZ support in the open-source Radeon Gallium3D drivers has been a bumpy road to say the least but it looks like some more improvements are imminent.

Since the start of HyperZ support in the open-source Radeon drivers in 2012 there have been many issues/workarounds to overcome, even going back to the ancient R300 Gallium3D driver, and issues have persisted through the R600g and RadeonSI drivers. Fortunately, there are a new round of improvements courtesy of Marek Olšák.


More about ATI/AMD HyperZ.


In new patches he posted today there is a new recommended setting from the hardware people for making Hyper-Z stable. The two magic states are supposed to fix Evergreen and Cayman GPUs as well as the more-modern SI/CI/VI GPUs.

With those fixes there, Marek goes ahead and re-enables Hyper-Z for stencil on Evergreen and Cayman GPUs in R600g and for all GCN GPUs via RadeonSI. Finally, he implements fast stencil clear support for the RadeonSI driver.
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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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