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Kernel and Mesa: Btrfs, Panfrost, Virgl

Submitted by Roy Schestowitz on Sunday 9th of June 2019 10:52:57 AM Filed under
Graphics/Benchmarks
Linux
  • Western Digital Continues Working On SMR / Zoned Device Support For Btrfs

    In addition to SUSE continuing to advance the Btrfs file-system, Western Digital has also been working on a big patch series around providing native support for zoned block devices.

    The zoned block device support is for supporting newer shingled magnetic recording (SMR) drives with the ZBC/ZAC commands. These are newer hard drives offering much higher storage capacities (10TB+) than were previously achievable due to the recording technique. There have been device-managed zoned support for file-systems not natively supporting these newer standards as well as a dm-zoned target in the Device Mapper code to help out in those scenarios as well.

  • Panfrost Making Use Of The Gallium3D I/O Vectorization For Better Performance

    At the end of May I wrote about Intel's Iris Gallium3D driver achieving performance optimizations with new NIR I/O vectorization functionality. The open-source Arm Mali "Panfrost" Gallium3D driver has now wired into this code too for better performance.

    The Intel Iris gains with this I/O vectorization were 1~9% with Skylake GT4e graphics. Thanks to this code being implemented in the Mesa NIR state tracker, it's just left up to the Gallium3D drivers to do a bit more for this vectorization pass after other optimizations are complete.

  • Mesa 19.2's Virgl Sees Huge Performance Win Around Buffer Copy Transfers

    For those using Virgl to enjoy Gallium3D-based OpenGL acceleration to guest virtual machines on Linux, the Mesa 19.2 release paired with the latest Virgl renderer library should provide a very significant speed-up.

    The virglrenderer code picked up support for copy transfers last month so the guest can avoid waiting if it needs to write to a busy resource. Alexandros Frantzis of Collabora who landed the Virglrenderer work has now seen his Mesa-side Virgl code merged to Mesa 19.2 Git.

»

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