Please fill out the 5 other review categories (security, privacy, etc) in chromestatus. Those will need to be started before the API owners can review.
On Thu, Oct 5, 2023 at 1:17 PM Ryan Harrison <rharri...@chromium.org> wrote: > +cc cwallez, since he is the WebGPU lead, and can respond authoritatively > if I am OOO > > Contact emailsrharri...@chromium.org > > ExplainerNone > > Specificationhttps://www.w3.org/TR/webgpu/#shader-f16 > > Summary > > Allows for the use of the half-precision floating-point type f16 in WebGPU > shaders (WGSL). Developers can use the 'shader-f16' feature from the WebGPU > spec and the 'f16' extension from the WGSL spec to access 16-bit floating > point variables and APIs in their shaders. > > > Blink componentInternals>GPU>Dawn > <https://bugs.chromium.org/p/chromium/issues/list?q=component:Internals%3EGPU%3EDawn> > > TAG reviewNone > > TAG review statusNot applicable > > Risks > > > Interoperability and Compatibility > > None > > > *Gecko*: Positive Mozilla has already implemented this feature. > > *WebKit*: Positive (https://bugs.webkit.org/show_bug.cgi?id=254668) > > *Web developers*: Positive f16 support in general has been requested > feature in multiple different web runtimes/frameworks, e.g. > https://github.com/microsoft/onnxruntime/issues/9758 and > http://tc39.es/proposal-float16array/ From the initial proposal, > https://github.com/gpuweb/gpuweb/issues/658, there were multiple > benchmarks/demoes that indicate a substantial performance benefit shown in > demos/tests, ~25% if ALU bound, and upto 50% if memory bound. TF.js has > been investigating using f16 in WebGPU, > https://github.com/gpuweb/gpuweb/issues/658#issuecomment-606492757 and > already has it available in the WebGL implementation TF.js has significant > improvements from forcing using Half Float (the GL equivalent feature), > https://github.com/tensorflow/tfjs/issues/1047 The Dawn team has > interacted with multiple internal and external partners that have indicated > that f16 support is an important feature for them to get the performance > needed to adopt WebGPU > > *Other signals*: Intel has dedicated significant resources to help > implement f16 in Dawn/Tint, and write proper testing coverage in the CTS. > > WebView application risks > > Does this intent deprecate or change behavior of existing APIs, such that > it has potentially high risk for Android WebView-based applications? > > None at the moment, WebGPU currently does not ship on Android WebView. > Parallel work is occuring to launch WebGPU on Android. > > > Debuggability > > None > > > Will this feature be supported on all six Blink platforms (Windows, Mac, > Linux, Chrome OS, Android, and Android WebView)?No > > All platforms will eventually have support. Will immediately be available > on Mac and Chrome OS, since those are platforms already support WebGPU. > Windows support depends on internal changes to use DXC, which are in > progress, so f16 will become availabe once that is finished. Linux and > Android are planned to have WebGPU support in the future, so feature will > become available when WebGPU does. > > > Is this feature fully tested by web-platform-tests > <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md> > ?No > > WebGPU/WGSL have a conformance test suite (https://github.com/gpuweb/cts) > that is regularly pulled into Chromium and part of the testing of Dawn/Tint > in Chromium. Test coverage for execution of f16 operations has been > implemented, https://github.com/gpuweb/cts/issues/1248. Additional > testing is in development. > > > Flag name on chrome://flagsNone > > Finch feature nameWebGPUExposeShader16 > > Requires code in //chrome?False > > Availability expectationFeature is available only in Chromium browsers > for the near future, on the order of months. Other browsers intend to ship > WebGPU and f16 support, but don't have specified timelines. > > Adoption expectationFeature is used by specific partner(s) to provide > functionality within 12 months of launch in Chrome. > > Adoption planMultiple partners are actively developing products/features > that will use f16 in WebGPU. > > Non-OSS dependencies > > Does the feature depend on any code or APIs outside the Chromium open > source repository and its open-source dependencies to function? > No > > Estimated milestones > Shipping on desktop 120 > > Anticipated spec changes > > Open questions about a feature may be a source of future web compat or > interop issues. Please list open issues (e.g. links to known github issues > in the project for the feature specification) whose resolution may > introduce web compat/interop risk (e.g., changing to naming or structure of > the API in a non-backward-compatible way). > None, f16 has been landed in the WebGPU and WGSL specs > https://github.com/gpuweb/gpuweb/pull/2696 (There is some discussion > about whether or not explicit enabling of extensions should be required. > Currently it is, so If this changes existing shaders would be fine because > the desire is to make enabling optional, not removing the mechanism > entirely). > > Link to entry on the Chrome Platform Status > https://chromestatus.com/feature/5180552617656320 > > This intent message was generated by Chrome Platform Status > <https://chromestatus.com/>. > > -- > You received this message because you are subscribed to the Google Groups > "blink-dev" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to blink-dev+unsubscr...@chromium.org. > To view this discussion on the web visit > https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAM4DYDaCcxwhdQb%2B%3DoZcAyd1-o3tU3qNu2Rbv5p0V95nGMeKQg%40mail.gmail.com > <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAM4DYDaCcxwhdQb%2B%3DoZcAyd1-o3tU3qNu2Rbv5p0V95nGMeKQg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "blink-dev" group. 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