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Linux Kernel and Mesa News

Submitted by Roy Schestowitz on Friday 11th of September 2020 06:19:52 PM Filed under
Graphics/Benchmarks
Linux
  • Kernel Bisecting Has Never Been Faster Than With AMD EPYC + AMD Threadripper

    While Zen 3 is just around the corner, current-generation Ryzen Threadripper and EPYC processors continue to impress particularly for build boxes and tasks like bisecting the Linux kernel's massive codebase.

    Traditionally bisecting every performance regression I come across at Phoronix whether it be in compilers, the Linux kernel, or other code-bases has been prohibitively time consuming (and in turn cooling/power expensive) especially when operating on thin margins as is from the depressed state of the web ad industry, etc, but the incredible speed of the latest EPYC and Threadripper processors -- and having many systems with them around -- has been working wonders for massive time savings and tracking down such issues.

  • Why TensorFlow Lite Has Been Running Slower On Recent Linux Kernels

    The Linux 5.0 to 5.9 kernel benchmarking posted this week showed TensorFlow Lite running slower since the Linux 5.5 kernel... On top of looking at the new Linux 5.9 regressions, I also spent some time bisecting and figuring out what happened for TensorFlow Lite last year that has at least for the system under test caused it to run slower for all the kernel releases this year as shown in the aforelinked article.

    So with the speedy AMD EPYC box and knowing the regression happened between Linux 5.4 and 5.5, it was on to bisecting the TensorFlow Lite performance drop. TensorFlow Lite is the open-source deep learning framework for on-device inference. TensorFlow Lite is an optimized version of TensorFlow catering to mobile and edge devices. This testing is focused on TensorFlow Lite with not yet evaluating the full TensorFlow performance or other deep learning workloads across the tested kernel versions with regards to this regression.

  • Mesa 20.3 Picks Up New Capabilities To Help With Display Presentation Jitter, Stuttering

    Being merged today to Mesa 20.3-devel were some improvements aiming to help with display presentation jitter and hopefully avoid stuttering in the frame-rate. 

    Adam Jackson of Red Hat has been working on supporting GLX_EXT_swap_control/GLX_EXT_swap_control_tear for Mesa's GLX implementation and on the Vulkan side support for VK_PRESENT_MODE_FIFO_RELAXED_KHR. 

  • Mesa Refactors Disk Cache - Working Towards Windows Support

    Mesa 20.3 feature development continues progressing nicely. 

    Timothy Arceri who works extensively on Mesa under his employment by Valve has been refactoring Mesa's disk cache. This revised disk cache that is now merged allows experimenting with different cache layouts for performance reasons. But in the process he also prepped support for Mesa's disk cache to support Microsoft Windows. 

»

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