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 < blink-dev@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 <chris...@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 < >> blink-dev@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 <chris...@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 <slightly...@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 emailsalanba...@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+unsubscr...@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+unsubscr...@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+unsubscr...@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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