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Graphics: AMDGPU, Radeon, Vulkan-Virgl

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Graphics/Benchmarks
  • Linux 4.18 AMDGPU Tests: Vega Taking A Hit

    Being roughly mid-way through the Linux 4.18 kernel development cycle, I spent some time this weekend running benchmarks of the AMDGPU DRM driver on Linux 4.18 Git compared to Linux 4.17 stable on three different Radeon graphics cards while using the Mesa 18.1.3 based drivers.

  • Radeon ROCm 1.8.2 Compute Stack In Beta, Might Work Under Ubuntu 18.04 LTS

    A new beta of the Radeon Open Compute "ROCm" stack was quietly made available for v1.8.2.

    While ROCm 1.9 will officially support Ubuntu 18.04 LTS, it looks like the ROCm 1.8.2 beta might contain preliminary Ubuntu 18.04 LTS "Bionic Beaver" support. A ROCm 1.8.2 beta user has commented that he was able to get 1.8.2 working on Ubuntu 18.04 with the Linux 4.16 kernel with the AMDKFD kernel driver.

  • Vulkan-Virgl Continues Progressing For Getting Vulkan Within VMs

    One of the most exciting Google Summer of Code 2018 projects is Vulkan-Virgl for supporting this modern graphics/compute API within virtual machines.

    Vulkan-Virgl is based off the existing Virgl initiative that has been providing OpenGL hardware acceleration to guest VMs using VirtIO-GPU and paired with some Mesa code and the Virgl rendering library. The GSoC 2018 project is making Virgl work with both OpenGL and Vulkan APIs.

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Linus Torvalds Comments On STIBP & He's Not Happy - STIBP Default Will End Up Changing

It turns out that Linus Torvalds himself was even taken by surprise with the performance hit we've outlined on Linux 4.20 as a result of STIBP "Single Thread Indirect Branch Predictors" introduction as well as back-porting already to stable series for cross-hyperthread Spectre V2 protection. He doesn't want this enabled in full by default. All of the benchmarking I've been doing the past few days to shine the light on the Linux kernel's STIBP addition appears to be paying off. My tests have found Linux 4.20 to incur significant performance penalties in many workloads -- in fact, more so than some of the earlier Spectre and Meltdown mitigations -- and STIBP is already being back-ported to stable series like Linux 4.19.2. PHP, Pythom, Java, and many other workloads are measurably affected and even the gaming performance to some extent. Read more

Submissions now open for the Fedora 30 supplemental wallpapers

Each release, the Fedora Design team works with the community on a set of 16 additional wallpapers. Users can install and use these to supplement the standard wallpaper. Submissions are now open for the Fedora 30 Supplemental Wallpapers, and will remain open until January 31, 2019 Have you always wanted to start contributing to Fedora but don’t know how? Submitting a supplemental wallpaper is one of the easiest ways to start as a Fedora contributor. Keep reading to learn how. Read more

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