RefCounted: use more precise barriers

This improves the DrawCallPerfRun/Vulkan_NoReuseBindGroups benchmark by
2% on an Intel processor but should be a bigger improvement on ARM.

The change was inspired by the Boost documentation at
https://www.boost.org/doc/libs/1_55_0/doc/html/atomic/usage_examples.html
Chromium's base::AtomicRefCount implementation and Rust's core::Arc
implementation.

BUG=dawn:304

Change-Id: I7ca71f34af20fd267cf2efc63871ff330b1dcc7c
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14482
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: David Turner <digit@google.com>
1 file changed
tree: 001ec48430c238b81ab43023926334649ca33aff
  1. build_overrides/
  2. docs/
  3. examples/
  4. generator/
  5. infra/
  6. scripts/
  7. src/
  8. third_party/
  9. .clang-format
  10. .gitattributes
  11. .gitignore
  12. .gn
  13. AUTHORS
  14. BUILD.gn
  15. codereview.settings
  16. CONTRIBUTING.md
  17. dawn.json
  18. dawn_wire.json
  19. DEPS
  20. LICENSE
  21. OWNERS
  22. PRESUBMIT.py
  23. README.chromium
  24. README.md
README.md

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.h version that Dawn implements.
    • A C++ wrapper for the webgpu.h.
  • 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

Helpful links:

Documentation table of content

Developer documentation:

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

Status

(TODO)

License

Apache 2.0 Public License, please see LICENSE.

Disclaimer

This is not an officially supported Google product.