Bug 217976

Summary:	[ iOS ] 5 webanimations/accelerated-/* tests are flaky failures
Product:	WebKit	Reporter:	Hector Lopez <hector_i_lopez>
Component:	New Bugs	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED CONFIGURATION CHANGED
Severity:	Normal	CC:	ap, bfulgham, graouts, graouts, webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified
See Also:	https://bugs.webkit.org/show_bug.cgi?id=217851

Description Hector Lopez 2020-10-20 10:59:55 PDT

webanimations/accelerated-transform-related-animation-property-order.html
webanimations/accelerated-translate-animation-additional-animation-added-in-flight.html	
webanimations/accelerated-translate-animation-underlying-transform-changed-in-flight.html
webanimations/accelerated-translate-animation-with-transform.html
webanimations/accelerated-translate-animation.html

Tests are flaky failure according to history on iOS: iOS 14 Simulator wk2 Release on iPhone SE (1st generation) with x86_64. 

webanimations/accelerated-transform-related-animation-property-order.html
webanimations/accelerated-translate-animation-additional-animation-added-in-flight.html

These two test are seeing constant failures on macOS. Mojave failures are being addressed by https://bugs.webkit.org/show_bug.cgi?id=217851
But webanimations/accelerated-translate-animation-additional-animation-added-in-flight.html is seeing constant failure on Catalina E wk1 Release on Macmini8,1 with x86_64


History:

https://results.webkit.org/?suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&test=webanimations%2Faccelerated-transform-related-animation-property-order.html&test=webanimations%2Faccelerated-translate-animation-underlying-transform-changed-in-flight.html&test=webanimations%2Faccelerated-translate-animation-with-transform.html&test=webanimations%2Faccelerated-translate-animation.html&platform=ios&limit=50000

webanimations/accelerated-translate-animation-additional-animation-added-in-flight.html

https://results.webkit.org/?suite=layout-tests&test=webanimations%2Faccelerated-translate-animation-additional-animation-added-in-flight.html&platform=ios&platform=mac

Diffs:
https://build.webkit.org/results/Apple-iOS-14-Simulator-Release-WK2-Tests/r268725%20(402)/webanimations/accelerated-transform-related-animation-property-order-diffs.html
https://build.webkit.org/results/Apple-iOS-14-Simulator-Release-WK2-Tests/r268725%20(402)/webanimations/accelerated-translate-animation-additional-animation-added-in-flight-diffs.html
https://build.webkit.org/results/Apple-iOS-14-Simulator-Release-WK2-Tests/r268725%20(402)/webanimations/accelerated-translate-animation-underlying-transform-changed-in-flight-diffs.html
https://build.webkit.org/results/Apple-iOS-14-Simulator-Release-WK2-Tests/r268725%20(402)/webanimations/accelerated-translate-animation-with-transform-diffs.html
https://build.webkit.org/results/Apple-iOS-14-Simulator-Release-WK2-Tests/r268725%20(402)/webanimations/accelerated-translate-animation-diffs.html

Comment 1 Radar WebKit Bug Importer 2020-10-20 11:00:37 PDT

<rdar://problem/70492616>

Comment 2 Alexey Proskuryakov 2020-10-21 17:36:17 PDT

I saw a theory that this could be a dupe of bug 217851. Is this still happening, with that bug now fixed?

Comment 3 Antoine Quint 2020-10-22 00:22:53 PDT

So for the tests:

webanimations/accelerated-transform-related-animation-property-order.html
webanimations/accelerated-translate-animation-additional-animation-added-in-flight.html	
webanimations/accelerated-translate-animation-underlying-transform-changed-in-flight.html
webanimations/accelerated-translate-animation-with-transform.html
webanimations/accelerated-translate-animation.html

There hasn't been a failure on iOS since r268735, which predates the fix for bug 217851, which is r268746. My guess is that r268746 does indeed fix this, but the bots started passing before that because of when they had been last rebooted. Indeed, the underlying cause was the up-time of the machine relative to times used in animation tests.

We would have to reboot those bots to know for sure. I'll let Hector or anyone else on the bot watching team decide what to do with this bug.

Comment 4 Brent Fulgham 2022-02-11 14:58:03 PST

Verified no failures since r268741