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857f21e8b5
There is currently a race condition in the metal backend with the updating of `mCompletedSerial`. It is currently possible for the `addCompletedHandler` to set to one value and then have the `CheckAndUpdateCompletedSerial` call immediately set it back to a lower value. This can then cause hangs as the serial never correctly updates again. This was happening on `dawn.node` when running a large number of CTS test cases all at the same time. Change-Id: I28fc58ab2b3737ca8039559718e539ce819e88bb Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/89780 Auto-Submit: Dan Sinclair <dsinclair@chromium.org> Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Dan Sinclair <dsinclair@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Dawn, a WebGPU implementation
Dawn is an open-source and cross-platform implementation of the work-in-progress WebGPU standard.
More precisely it implements webgpu.h that is a one-to-one mapping with the WebGPU IDL.
Dawn is meant to be integrated as part of a larger system and is the underlying implementation of WebGPU in Chromium.
Dawn provides several WebGPU building blocks:
- WebGPU C/C++ headers that applications and other building blocks use.
- The
webgpu.hversion that Dawn implements. - A C++ wrapper for the
webgpu.h.
- The
- A "native" implementation of WebGPU using platforms' GPU APIs:
- D3D12 on Windows 10
- Metal on macOS and iOS
- Vulkan on Windows, Linux, ChromeOS, Android and Fuchsia
- OpenGL as best effort where available
- A client-server implementation of WebGPU for applications that are in a sandbox without access to native drivers
- Tint is a compiler for the WebGPU Shader Language (WGSL).
Helpful links:
- Dawn bug tracker if you find issues with Dawn.
- Tint bug tracker if you find issues with Tint.
- Dawn's mailing list for other discussions related to Dawn.
- Dawn's source code
- Dawn's Matrix chatroom for live discussion around contributing or using Dawn.
- WebGPU's Matrix chatroom
- Tint mirror for standalone usage.
Documentation table of content
Developer documentation:
- Dawn overview
- Building
- Contributing
- Code of Conduct
- Testing Dawn
- Debugging Dawn
- Dawn's infrastructure
- Dawn errors
- Tint experimental extensions
User documentation: (TODO, figure out what overlaps with the webgpu.h docs)
Status
(TODO)
License
Apache 2.0 Public License, please see LICENSE.
Disclaimer
This is not an officially supported Google product.