We've just merged the spec after it got its final approval. On Wednesday, January 15, 2025 at 11:13:34 AM UTC-5 Chris Harrelson wrote:
> Great thanks, sounds like a very useful OT. > > Now we're just waiting for the spec PR to land, since it seems to be > approved. > > On Wed, Jan 8, 2025 at 7:13 PM 'Alan Baker' via blink-dev < > blin...@chromium.org> wrote: > >> The origin trial resulted in the following findings: >> >> 1. This functionality can achieve the performance improvements we >> expected. Meet integrated the functionality into some of its ML shaders. >> Benchmarking subgroups vs integer dot products (previous best) for >> matrix-vector multiply shaders resulted in speed ups of 2.3 - 2.9x >> depending on the device. >> 2. Limits were not the right design choice for subgroup size >> reporting in the API. They have since been moved into GPUAdapterInfo as >> they are really more static properties of a device. >> 3. The initial design contained an extra diagnostic that defaulted to >> an error to increase portability, but was found to hamper the user >> experience more than the value it added. It prevented very common code >> patterns unrelated to the subgroup functionality from compiling cleanly. >> It >> was decided to remove it from the design. >> >> >> On Wed, Jan 8, 2025 at 4:16 PM Chris Harrelson <chri...@chromium.org> >> wrote: >> >>> Ok thanks for clarifying that this is shipping and not further >>> experimentation. >>> >>> Could you share the findings from the origin trials? >>> >>> On Wed, Jan 8, 2025 at 11:31 AM 'Alan Baker' via blink-dev < >>> blin...@chromium.org> wrote: >>> >>>> I've filed the standard's position issues (and added to the feature). >>>> Here they are for reference: >>>> >>>> - Mozilla: >>>> https://github.com/mozilla/standards-positions/issues/1160 >>>> - WebKit: https://github.com/WebKit/standards-positions/issues/446 >>>> >>>> The name was a bad choice. I wasn't familiar with this process >>>> initially and only thought of the name with the Origin trial in mind. We >>>> don't consider this an experiment anymore. >>>> >>>> On Wed, Jan 8, 2025 at 11:31 AM Chris Harrelson <chri...@chromium.org> >>>> wrote: >>>> >>>>> Also: >>>>> >>>>> >>>>> * The spec PR needs to land >>>>> * What do you mean by "experimentation" in the title of this Intent? >>>>> >>>>> On Wed, Jan 8, 2025 at 8:30 AM Alex Russell <sligh...@chromium.org> >>>>> wrote: >>>>> >>>>>> Hey Alan, >>>>>> >>>>>> Just for the avoidance of future friction, we try to use the explicit >>>>>> signals systems from Apple and Mozilla because they've asked us not to >>>>>> use >>>>>> their rep's statements in WGs as assent. Is it possible for you to file >>>>>> those? >>>>>> >>>>>> Best, >>>>>> >>>>>> Alex >>>>>> >>>>>> On Monday, January 6, 2025 at 10:48:36 AM UTC-8 Alan Baker wrote: >>>>>> >>>>>>> Contact emailsalan...@google.com >>>>>>> >>>>>>> Explainer >>>>>>> https://github.com/gpuweb/gpuweb/blob/main/proposals/subgroups.md >>>>>>> >>>>>>> Specificationhttps://github.com/gpuweb/gpuweb/pull/4963 >>>>>>> >>>>>>> Approved by Apple rep, editorial comment by Mozilla rep. >>>>>>> >>>>>>> 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 componentBlink>WebGPU >>>>>>> <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EWebGPU%22> >>>>>>> >>>>>>> TAG reviewNone >>>>>>> >>>>>>> TAG review statusNot applicable >>>>>>> >>>>>>> Origin Trial NameWebGPU Subgroups Features >>>>>>> >>>>>>> Chromium Trial NameWebGPUSubgroupsFeatures >>>>>>> >>>>>>> Origin Trial documentation link >>>>>>> https://github.com/gpuweb/gpuweb/blob/main/proposals/subgroups.md >>>>>>> >>>>>>> WebFeature UseCounter namekWebGPUSubgroupsFeatures >>>>>>> >>>>>>> Risks >>>>>>> >>>>>>> >>>>>>> Interoperability and Compatibility >>>>>>> >>>>>>> None >>>>>>> >>>>>>> >>>>>>> *Gecko*: No signal >>>>>>> >>>>>>> *WebKit*: No signal >>>>>>> >>>>>>> *Web developers*: No signals >>>>>>> >>>>>>> *Other signals*: >>>>>>> >>>>>>> Security >>>>>>> >>>>>>> None. This feature exposes functionality for operations only within >>>>>>> a single draw/dispatch. Data is contained within a single users run. >>>>>>> >>>>>>> >>>>>>> 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 >>>>>>> >>>>>>> >>>>>>> Debuggability >>>>>>> >>>>>>> No special debugging is available for this feature as it resides >>>>>>> solely on the GPU. >>>>>>> >>>>>>> >>>>>>> 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 >>>>>>> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md> >>>>>>> ?No >>>>>>> >>>>>>> Flag name on about://flagsNone >>>>>>> >>>>>>> Finch feature nameNone >>>>>>> >>>>>>> Non-finch justificationNone >>>>>>> >>>>>>> Requires code in //chrome?False >>>>>>> >>>>>>> Availability expectationBoth Apple and Mozilla have indicated they >>>>>>> plan to support this feature in the future. Those implementations are >>>>>>> catching up to Chrome in terms of core functionality currently. WebGPU >>>>>>> is >>>>>>> part of Safari technical previews and Mozilla nightly builds. >>>>>>> >>>>>>> Adoption expectationThis feature should have wide adoption for >>>>>>> specific use cases. It is not expected that all WebGPU shaders would >>>>>>> utilize subgroups, but many applications (e.g. ML) could. >>>>>>> >>>>>>> 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 134 >>>>>>> Origin trial desktop first 128 >>>>>>> Origin trial desktop last 131 >>>>>>> Origin trial extension 1 end milestone 133 >>>>>>> Shipping on Android 134 >>>>>>> Origin trial Android first 128 >>>>>>> Origin trial Android last 131 >>>>>>> Shipping on WebView 134 >>>>>>> Origin trial WebView first 128 >>>>>>> Origin trial WebView last 131 >>>>>>> >>>>>>> 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). >>>>>>> Editorial changes only. Future features are likely to build on top >>>>>>> of this extension. >>>>>>> >>>>>>> Link to entry on the Chrome Platform Status >>>>>>> https://chromestatus.com/feature/5126409856221184?gate=5073549680443392 >>>>>>> >>>>>>> Links to previous Intent discussionsIntent to Experiment: >>>>>>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CABg%2BrB67gB5gUeDVPaMZ7fZwmeARTUsizs1BTXFXKGpJ%3DpF1TQ%40mail.gmail.com >>>>>>> Intent to Extend Experiment 1: >>>>>>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CABg%2BrB5jfO13yZGBxMAHRgZX_P0qbixCKSK10SujYkBxftujnQ%40mail.gmail.com >>>>>>> >>>>>>> >>>>>>> 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+...@chromium.org. >>>>>> To view this discussion visit >>>>>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/1969ee25-f88c-482d-adb1-88846d1d4e64n%40chromium.org >>>>>> >>>>>> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/1969ee25-f88c-482d-adb1-88846d1d4e64n%40chromium.org?utm_medium=email&utm_source=footer> >>>>>> . >>>>>> >>>>> -- >>>> 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+...@chromium.org. >>>> To view this discussion visit >>>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CABg%2BrB7yinOiFXX1ud4hLU9Y2F-9w8O1EL4KZ-KTWDOGCt-B2A%40mail.gmail.com >>>> >>>> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CABg%2BrB7yinOiFXX1ud4hLU9Y2F-9w8O1EL4KZ-KTWDOGCt-B2A%40mail.gmail.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> -- >> 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+...@chromium.org. >> > To view this discussion visit >> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CABg%2BrB5PA7QJku0dWkS2_jXOVC4V6dWAttbF850jEZmKu684Fg%40mail.gmail.com >> >> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CABg%2BrB5PA7QJku0dWkS2_jXOVC4V6dWAttbF850jEZmKu684Fg%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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