Marek Lands Radeon Gallium3D HyperZ Improvements
Written by Michael Larabel in AMD on 1 September 2014 at 08:30 PM EDT. 14 Comments
Well known open-source Radeon driver developer Marek Olšák has landed a number of commits today inside mainline Mesa Git for improving the state of HyperZ for AMD hardware, a feature that remains disabled by default for the open-source Radeon Linux driver due to stability and artifact issues.

Among the work that Marek committed today after floating around on the Mesa development list for a while were an EXPCLEAR optimization, a change to R600g/RadeonSI HTILE initialization, fast depth clear for RadeonSI, a HyperZ performance improvement, a fix for HyperZ hanging on R600g/RadeonSI, a golden setting for R700 GPUs, fixing layered clear, improved fast depth clears for R600g, R600g using the HTILE allocator from RadeonSI, and several other changes.


These changes to AMD's R600g and RadeonSI Gallium3D drivers should improve the stability and performance of HyperZ, a performance-focused feature with a troubled history inside the open-source driver stack. Hopefully after these latest improvements have been more widely tested, AMD will be able to enable the feature again by default. These patches are found in mainline Git for Mesa 10.4-devel. The HyperZ support can be manually enabled by setting the R600_DEBUG=hyperz until it gets turned back on. HyperZ is an easy way to boost the open-source Radeon Linux GPU driver performance.
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Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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