158647 – LayoutTest svg/animations/begin-event-syncbase.svg is a flaky failure

Bug 158647 - LayoutTest svg/animations/begin-event-syncbase.svg is a flaky failure

Summary: LayoutTest svg/animations/begin-event-syncbase.svg is a flaky failure

Status:	NEW

Alias:	None

Product:	WebKit
Classification:	Unclassified
Component:	SVG (show other bugs)
Version:	WebKit Nightly Build
Hardware:	Unspecified Unspecified

Importance:	P2 Normal
Assignee:	Nobody

URL:
Keywords:

Depends on:
Blocks:

Reported:	2016-06-10 17:13 PDT by Ryan Haddad
Modified:	2016-09-27 10:02 PDT (History)
CC List:	6 users (show)

See Also:

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.

Description Ryan Haddad 2016-06-10 17:13:37 PDT

[mac-wk1] LayoutTest svg/animations/begin-event-syncbase.svg is a flaky failure

<https://build.webkit.org/builders/Apple%20El%20Capitan%20Debug%20WK1%20(Tests)/builds/5811>
<https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=svg%2Fanimations%2Fbegin-event-syncbase.svg>

Comment 1 Alexey Proskuryakov 2016-06-12 21:45:37 PDT

Getting a red square instead of a green one.

Comment 2 Alexey Proskuryakov 2016-09-27 10:01:29 PDT

Happens with both WK1 and WK2. I can reproduce on my MacBook Pro like this:

run-webkit-tests --no-build -v --repeat 1000 -f --child-processes=50 svg/animations/begin-event-syncbase.svg

Overloading CPU in other ways should work too.

Comment 3 Alexey Proskuryakov 2016-09-27 10:02:29 PDT

This is a very simple test. I've long been puzzled by how animation timers can run out of step with normal timers, what's the mechanism here?