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Graphics: Zink and Radeon

Submitted by Roy Schestowitz on Saturday 20th of February 2021 03:12:17 AM Filed under
Graphics/Benchmarks
  • Mike Blumenkrantz: Notes

    I’ve been getting a lot of pings over the past week or two about ES 3.2 support.

    Here’s the deal.

    It’s not happening soon. Probably.

  • With OpenGL 4.6 Achieved, Zink Working CTS Fixes, Substantial Performance Gains - Phoronix

    Now that Mesa 21.1 has OpenGL 4.6 support for Zink, the attention is turning to fixes for the OpenGL Conformance Test Suite and juicing as much performance as possible out of this OpenGL on Vulkan driver layer within Mesa.

    Most active Zink developer Mike Blumenkrantz, working under contract for Valve, has been working on the CTS fixes and performance improvements now that mainline Mesa has the Zink GL 4.6 support. Besides OpenGL 4.6, OpenGL ES 3.1 is also now possible with Zink.

    Over the coming days and month or so, he is planning to land improved barrier support, removing explicit pre-fencing, descriptor caching, and various bug fixes. Even this morning a number of the Zink patches were merged.

  • Radeon "GFX90A" Added To LLVM As Next-Gen CDNA With Full-Rate FP64 - Phoronix

    It looks like the open-source driver support to the next-generation CDNA GPU / MI100 "Arcturus" successor is on the way. Hitting mainline AMDGPU LLVM is a new "GFX90A" target adding new interesting features for compute.

    The AMD GFX90A target is a big addition and was quickly and quietly merged this week... So much so that it generated some concerns and criticism in the review from other upstream LLVM developers that the merge request was just for a short time (a little more than one hour) before merging it, not allowing sufficient time for code review on such a large patch. To which one of the responses in return was over "we needed this upstreamed and no time was given to him to break it up into reasonably sized piece [across multiple patches that are easier for code review]." Code outside of the AMDGPU LLVM back-end isn't touched but understandably some of the upstream developers are put off by the rushed process not allowing for any open-source code review prior to landing such a massive addition.

»

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