[webkit-dev] Introducing brand new EWS

Ryosuke Niwa rniwa at webkit.org
Thu Apr 4 19:09:54 PDT 2019

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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