LGTM3
On 1/16/25 9:31 AM, Yoav Weiss (@Shopify) wrote:
LGTM2
On Thu, Jan 16, 2025 at 5:28 PM Chris Harrelson
<chris...@chromium.org> wrote:
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 emails
alan...@google.com
Explainer
https://github.com/gpuweb/gpuweb/blob/main/proposals/subgroups.md
Specification
https://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 component
Blink>WebGPU
<https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EWebGPU%22>
TAG review
None
TAG review status
Not applicable
Origin Trial Name
WebGPU Subgroups Features
Chromium Trial Name
WebGPUSubgroupsFeatures
Origin Trial documentation
link
https://github.com/gpuweb/gpuweb/blob/main/proposals/subgroups.md
WebFeature UseCounter name
kWebGPUSubgroupsFeatures
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://flags
None
Finch feature name
None
Non-finch justification
None
Requires code in //chrome?
False
Availability expectation
Both 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 expectation
This 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
discussions
Intent 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.
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/CAOMQ%2Bw_%2Bmsmzhau1A-h_2ixJgWgddmdpD33rdQpeHf4BNrSsyg%40mail.gmail.com
<https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAOMQ%2Bw_%2Bmsmzhau1A-h_2ixJgWgddmdpD33rdQpeHf4BNrSsyg%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/CAOmohSLkSuNRo4PLcXSkKhwzyDYtifA5Ez6js7A6F22CKxrUmA%40mail.gmail.com
<https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAOmohSLkSuNRo4PLcXSkKhwzyDYtifA5Ez6js7A6F22CKxrUmA%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/08da16fa-778c-48b4-9394-13a4026500bf%40chromium.org.
