NVIDIA, Wayland, Vulkan & Linux #news #nvidia #wayland #linux #vulkan #gaming #fedora @3DGAMEMAN
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Sources:
https://www.phoronix.com/news/NVIDIA-Wayland-Roadmap-2024
https://indico.freedesktop.org/event/6/contributions/288/attachments/211/289/Vulkan for Wayland Compositors_ the new best choice_.pdf
Fedora: https://fedoraproject.org/
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Source: Vulkan for Wayland Compositors: the new best choice? by Austin Shafer
Main Theme: Exploring the advantages of using Vulkan for Wayland compositors, particularly highlighting its explicit design and potential benefits over traditional approaches.
Key Ideas and Facts:
Explicit Image Properties:
Vulkan's explicit handling of image residency and tiling allows for efficient format conversions and cross-vendor copies using vkCmdCopyImage() and vkCmdBlitImage().
This eliminates the need for expensive CPU copies, especially beneficial for vendors that cannot render to linear formats.
Quote: "Currently with EGL we have to fall back to a very expensive CPU copy. With Vulkan we can still use vkCmdCopyImage()."
Multi-Device Awareness:
Vulkan's inherent support for multiple devices simplifies handling device groups, queues, and memory residency.
This opens up possibilities for multi-vendor device groups and cross-GPU operations.
Quote: "No need to for tracking current context. Memory Residency is Explicit."
Potential for Spec Extension:
Vulkan's extensibility allows for future enhancements tailored to Wayland compositors, such as:
Multi-vendor device group support.
Scanout image usage flags.
API calls for cross-GPU copies.
Miscellaneous Advantages:
Well-defined synchronization and memory model eliminates reliance on implicit synchronization or glFinish().
Fine-grained work submission and validation layers offer improved control and debugging capabilities.
Timeline semaphores provide powerful synchronization options and potential integration with Linux DRM syncobj.
Overall:
The document advocates for considering Vulkan as a viable option for Wayland compositors due to its explicit design, efficiency in image handling, multi-device awareness, and potential for future extensions. However, it acknowledges that Vulkan may not be a perfect solution for all compositors and encourages further discussion on its suitability.