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dawn / dawn / ec4d78832f2a478e9e8c3bff45471d222368f22c
commitec4d78832f2a478e9e8c3bff45471d222368f22c[log] [tgz]
authorPeter McNeeley <petermcneeley@google.com>Wed May 14 14:34:30 2025 -0700
committerDawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>Wed May 14 14:34:30 2025 -0700
treef5f1dadf3a3c83a19cd498c48c86537dcb62a99a
parent8a5a860e72f9a7035af3ed5f8f9d41c339f27ff0 [diff]
[tint] MSL Const arrays/structs access turn into program constants

The constant manager will inline const values directly at point of usage. This means something like a const array will be constructed
inside nested loops. The metal compiler (and backend) does not
optimize/hoist these constants out of the loops and we can end up
with executions that initializing large arrays every loop iteration.

To fix this we use the "program scope constants" of msl to define
constants (array/struct) at program scope.


Doc:
https://docs.google.com/document/d/14Nmg07G-J2BVb5PhEwdZ-R4Lj-NMUvOI7IShNpD_a1o/edit?resourcekey=0-xDZxMV-IqUdxPmEXuUgqMw&tab=t.0

Bug:412476137,413690572
Change-Id: If15e4dfc59f1b1f34ac5b52883c00f9172db14c1
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/241595
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: Peter McNeeley <petermcneeley@google.com>
69 files changed
tree: f5f1dadf3a3c83a19cd498c48c86537dcb62a99a
  1. .github/
  2. .vscode/
  3. build_overrides/
  4. docs/
  5. generator/
  6. include/
  7. infra/
  8. scripts/
  9. src/
  10. test/
  11. third_party/
  12. tools/
  13. webgpu-cts/
  14. build
  15. buildtools
  16. testing
  17. .bazelrc
  18. .clang-format
  19. .clang-format-ignore
  20. .clang-tidy
  21. .git-blame-ignore-revs
  22. .gitattributes
  23. .gitignore
  24. .gitmodules
  25. .gn
  26. .style.yapf
  27. .vpython3
  28. AUTHORS
  29. BUILD.bazel
  30. BUILD.gn
  31. CMakeLists.txt
  32. CMakeSettings.json
  33. CODE_OF_CONDUCT.md
  34. codereview.settings
  35. CONTRIBUTING.md
  36. CPPLINT.cfg
  37. DEPS
  38. DIR_METADATA
  39. go.mod
  40. go.sum
  41. go_presubmit_support.py
  42. LICENSE
  43. OWNERS
  44. PRESUBMIT.py
  45. README.chromium
  46. README.md
  47. WATCHLISTS
  48. WORKSPACE.bazel
README.md

Build Status Matrix Space

Dawn, a WebGPU implementation

Dawn is an open-source and cross-platform implementation of the 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.h version that Dawn implements.
    • A C++ wrapper for the webgpu.h.
  • A “native” implementation of WebGPU using platforms' GPU APIs: D3D12, Metal, Vulkan and OpenGL. See per API support for more details.
  • 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) that can be used in standalone to convert shaders from and to WGSL.

Helpful links:

Documentation table of content

Developer documentation:

User documentation: (TODO, figure out what overlaps with the webgpu.h docs)

License

BSD 3-Clause License, please see LICENSE.

Disclaimer

This is not an officially supported Google product.