[webkit-dev] Introducing brand new EWS

Ryosuke Niwa rniwa at webkit.org
Thu Apr 11 17:22:47 PDT 2019

Yes, that would be great.

Although I'd still prefer having a proper waterfall view so that when my
patch isn't getting processed / very behind in the queue, I can figure out
what's causing it on my own instead of having to tell a bot watcher
something is wrong with EWS.

- R. Niwa

On Thu, Apr 11, 2019 at 12:17 PM Aakash Jain <aakash_jain at apple.com> wrote:

> Hi Ryosuke,
> Sorry for the delay. I will soon be adding the feature to display patch's
> position in queue in https://bugs.webkit.org/show_bug.cgi?id=196607.
> Would that address your concern?
> Thanks
> Aakash
> On Apr 4, 2019, at 10:09 PM, Ryosuke Niwa <rniwa at webkit.org> wrote:
> The new bubbles seem to be working well, and having API tests running in
> EWS is great!
> Can we add the waterfall view to https://ews-build.webkit.org/#/builders so
> that we can see where our patches are in the queue?
> - R. Niwa
> On Thu, Apr 4, 2019 at 6:59 PM Aakash Jain <aakash_jain at apple.com> wrote:
>> Introducing brand new EWS
>> with EWS for API Tests (for macOS and iOS)
>> and EWS for WebKitPerl Tests!
>> Starting today, when you upload a patch to bugs.webkit.org, you will see
>> few more bubbles (for API tests and webkitperl tests). You might also see
>> additional button 'Submit to new EWS' (if the patch doesn't have r? flag).
>> The new EWS comes with many new features and there are lot more I want to
>> add. But, I don't want you guys to wait more to start getting the benefits.
>> That's why I am rolling it out in phases, starting with EWS for API Tests
>> and WebKitPerl Tests. These are tests which are not currently covered by
>> the existing EWS. Next step would be to move queues from existing EWS to
>> new EWS one by one, with the eventual goal of moving over everything to new
>> EWS.
>> *Why new EWS?*
>> The existing EWS has certain architectural limitations. One of the
>> prominent limitation is that there is no concept of building and testing
>> the patch on different queues. If we have three queues: WK1 tests, WK2
>> tests and API tests, all three queues would need to compile WebKit
>> independently. So WebKit would be compiled thrice instead of once. This is
>> inefficient and thereby require more hardware.
>> The new EWS has separate builder and tester queues. Builder queues build
>> once and upload the archive. Multiple tester queues download that same
>> archive and run tests on that. That way WebKit is compiled only once, and
>> re-used on multiple tester queues. This improves system efficiency and
>> allows us to add new test queues with substantially less hardware.
>> The new EWS uses Buildbot at the back-end, which is a production-level CI
>> system. It is easier to maintain and automatically provide various features
>> like historical build logs, real-time log streaming, easier bot management,
>> ability to retry a build etc. Plus, it’s a system most of you are already
>> familiar with (build.webkit.org).
>> *How can you contribute:*
>> If you are interested in contributing, the source code is located at:
>> ews-build (Buildbot): Tools/BuildSlaveSupport/ews-build
>> ews-app (web-app): Tools/BuildSlaveSupport/ews-app
>> Detailed instructions are at:
>> https://trac.webkit.org/wiki/EarlyWarningSystem#ContributingtoEarlyWarningSystem
>> *Upcoming features:*
>> - status-bubble should display position in queue
>> https://bugs.webkit.org/show_bug.cgi?id=196607
>> - EWS should comment on Bugzilla bugs about failures
>> https://bugs.webkit.org/show_bug.cgi?id=196598
>> - EWS should have a way to retry a patch
>> https://bugs.webkit.org/show_bug.cgi?id=196599
>> - Security EWS https://bugs.webkit.org/show_bug.cgi?id=196605
>> If you notice any issue, please feel free to file bugs (and assign to me).
>> Thanks & Regards
>> Aakash Jain
>> _______________________________________________
>> webkit-dev mailing list
>> webkit-dev at lists.webkit.org
>> https://lists.webkit.org/mailman/listinfo/webkit-dev
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