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Linux Kernel: VKMS, CAKE, Xen and AMDVLK

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Graphics/Benchmarks
Linux
  • Virtual Kernel Mode-Setting Driver Being Added To Linux 4.19

    Linux 4.19 is shaping up to be a pretty exciting kernel release for what is expected to be the last version before Linux 5.0.

    Adding to the list of Direct Rendering Manager (DRM) improvements in Linux 4.19, VKMS has been added to Linux 4.19. The VKMS driver is the virtual kernel mode-setting effort, most recently worked on as part of this year's Google Summer of Code.

    The virtual KMS driver is a basic KMS driver exposing a CRTC/encoder/connector/plane that can be used for headless machines to run an X.Org Server or even Wayland and serves for virtual display purposes without necessa

  • Networking CAKE Is Ready For Tasting With Linux 4.19

    For those maintaining their own home-built Linux router, Linux 4.19 is going to be pretty exciting: CAKE Qdisc has been merged into net-next, making it a feature for this next kernel cycle.

  • Latest Xen Hypervisor Arrives Late, but Greatly Improved
  • AMDVLK Vulkan Driver Now Supports Direct Display Mode For VR HMDs

    The AMDVLK open-source Radeon Vulkan Linux driver has seen its latest weekly code drop that brings with it some of the extensions needed for supporting the Steam VR experience.

    The AMDVLK driver now supports VK_EXT_direct_mode_display and VK_EXT_acquire_xlib_display extensions. These extensions are needed so a Vulkan application/compositor can take exclusive control of display(s), such as the use-case for virtual reality head-mounted displays (VR HMDs) with being controlled by the SteamVR compositor. The VK_EXT_acquire_xlib_display extension is needed for acquiring control of a display that is associated with an X11 screen from the X.Org Server.

More in Tux Machines

Wine and Games for GNU/Linux

  • Wine 3.13 is out as well as DXVK 0.63 for D3D11 with Vulkan
    First of all the latest Wine development release is out with Wine 3.13 and on top of that DXVK for Vulkan-based D3D11 in Wine also release version 0.63.
  • Feral's GameMode 1.2 Released For Optimizing Linux Gaming
    For what just started out as a tool to ensure you are using the "performance" frequency scaling governor when running Linux games, Feral's open-source GameMode system tool has slowly been picking up some extra functionality. Out this weekend is Feral GameMode 1.2 as the newest release. GameMode 1.2 adds configuration options about the default and desired governors, now supports soft real-time scheduling on kernels with SCHED_ISO support and will then use renice to boost games to a higher priority, the GameMode service is now D-Bus activated than needing to be explicitly enabled by systemd, and the GameMode libraries are now properly versioned.
  • Stardew Valley multiplayer just got a PC release date
    Since the moment Stardew Valley launched back in 2016, multiplayer has been one of the most anticipated additions to the games. After a period of beta testing, it’s nearly ready to roll out on PC, Mac, and Linux. While it probably isn’t going to look a lot different from the beta that’s currently available, this is exciting news for more reasons than one.
  • Multiplayer is coming to ‘Stardew Valley’ on PC, Mac and Linux
    According to a tweet from Eric Barone (@ConcernedApe), the sole developer behind Stardew Valley, the feature is coming to the lighthearted farming game on August 1st. Along with the release date, the game’s developer also released a new trailer for the feature (see it above).
  • 'Stardew Valley' multiplayer arrives on PC, Mac and Linux August 1st

Android Leftovers

Jonathan Dieter: Small file performance on distributed filesystems - Round 2

Last year, I ran some benchmarks on the GlusterFS, CephFS and LizardFS distributed filesystems, with some interesting results. I had a request to redo the test after a LizardFS RC was released with a FUSE3 client, since it is supposed to give better small file performance. I did have a request last time to include RozoFS, but, after a brief glance at the documentation, it looks like it requires a minimum of four servers, and I only had three available. I also looked at OrangeFS (originally PVFS2), but it doesn’t seem to provide replication, and, in preliminary testing, it was over ten times slower than the alternatives. NFS was tested and its results are included as a baseline. I once again used compilebench, which was designed to emulate real-life disk usage by creating a kernel tree, reading all the files in the tree, simulating a compile of the tree, running make clean, and finally deleting the tree. The test was much the same as last time, but with one important difference. Last time, the clients were running on the same machines that were running the servers. LizardFS benefited hugely from this as it has a “prefer local chunkserver” feature that will skip the network completely if there’s a copy on the local server. This time around, the clients were run on completely separate machines from the servers, which removed that advantage for LizardFS, but which I believe is a better reflection on how distributed filesystems are generally used. I would like to quickly note that there was very little speed difference between LizardFS’s FUSE2 and FUSE3 clients. The numbers included are from the FUSE3 client, but they only differed by a few percentage points from the FUSE2 client. Read more

GNOME 3.30 Desktop Environment to Enter Beta on August 1, GNOME 3.29.4 Is Out

With a two-day delay, the GNOME Project through Javier Jardón announced today the release of the fourth and last development snapshot of the GNOME 3.30 desktop environment before it enters beta testing next month, GNOME 3.29.4, which continues to add improvements to various of GNOME's core components and applications. However, due to the summer vacation and the GUADEC conference, GNOME 3.29.4 isn't a major snapshot as many would have expected. It only adds some minor changes and bug fixes to a handful of components, including GNOME Shell, Mutter, Evolution, GNOME Photos, GNOME Builder, GNOME Online Accounts, Polari, Bijiben, Evince, Epiphany, Baobab, GNOME Control Center, and File Roller. Read more Also: GNOME 3.29.4 Released As Another Step Towards GNOME 3.30