Great! LGTM1 On Thu, Jan 16, 2025 at 8:02 AM 'Alan Baker' via blink-dev < blink-dev@chromium.org> wrote:
> 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. > To unsubscribe from this group and stop receiving emails from it, send an > email to blink-dev+unsubscr...@chromium.org. > To view this discussion visit > https://groups.google.com/a/chromium.org/d/msgid/blink-dev/19c91865-372f-43f8-86c1-484b3856cb58n%40chromium.org > <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/19c91865-372f-43f8-86c1-484b3856cb58n%40chromium.org?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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