Intent to Experiment: WebGPU Subgroups experimentation

[Alan Baker‏]

Contact emails

alan...@google.com

Explainer

https://github.com/gpuweb/gpuweb/blob/main/proposals/subgroups.md

Specification

None

Summary

Adds subgroup functionality to WebGPU. Subgroup operations perform SIMT operations to provide efficient communication and data sharing among groups of invocations. These operations can be used to accelerate applications by reducing memory overheads incurred by inter-invocation communication.

Blink component

Blink>WebGPU

TAG review

None

TAG review status

Pending

Risks

Interoperability and Compatibility

None

Gecko: No signal

WebKit: No signal

Web developers: No signals

Other signals:

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

Goals for experimentation

We wish to more broadly test portability, performance, and reach beyond our accessible test devices. We have partners that could leverage these features in existing products to provide feedback. For example, Mediapipe would be able to leverage this feature easily.

We also wish to gather feedback to help shape the API and answer the following questions:
* Which parts are essential?
* What additions would make a meaningful impact?
* Can we mitigate non-portable behaviours for common usages?

Ongoing technical constraints

None

Debuggability

None

Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?

No

Is this feature fully tested by web-platform-tests?

No

Flag name on chrome://flags

None

Finch feature name

None

Non-finch justification

None

Requires code in //chrome?

False

Estimated milestones

No milestones specified

Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/5126409856221184

This intent message was generated by Chrome Platform Status.

[Yoav Weiss (@Shopify)‏]

What milestones do you want the experiment to run?

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[Yoav Weiss (@Shopify)‏]

LGTM to experiment M128-131 inclusive

On Wed, Jun 12, 2024 at 4:11 PM Alan Baker <alan...@google.com> wrote:

I've updated the feature. We'd like to start in milestone 128 for 4 milestones.

[Yoav Weiss (@Shopify)‏]

Please kick-off the chrome status reviews on Privacy, Security and Debuggability before turning on the experiment.

[Alan Baker‏]

I've updated the feature. We'd like to start in milestone 128 for 4 milestones.

On Wed, Jun 12, 2024 at 6:06 AM Yoav Weiss (@Shopify) <yoav...@chromium.org> wrote: