1693639 - Tsan needs to run web-platform tests sequentially

Status: RESOLVED FIXED

(Core :: Sanitizers, task)

Description

[Kris Wright :KrisWright]

Bug 1644147 massively increases in frequency on thread sanitizer:
https://treeherder.mozilla.org/jobs?repo=try&revision=2f094d451229c6276534e7a5d7cfefb406540336&selectedTaskRun=W-r1mhztRFObE3d61hLqYA.0

But if we run the tests sequentially, the chances of running into the failure are greatly decreased:
https://treeherder.mozilla.org/jobs?repo=try&revision=65e47a8901445ee946308cd76b5dfef9cc466aac&selectedTaskRun=GDuZHa-dS365x4VJor1Qlg.0

We feel these are more acceptable levels and we should be running the tests sequentially from now on. Thread sanitizer consumes a lot of resources and often running tests in parallel can cause unexpected timeouts.

Comment 1

[Kris Wright :KrisWright]

Attachment: Bug 1693639 - run WPT sequentially on tsan

Tsan is prone to timeouts and running these tests sequentially reduces the likelihood of Bug 1644147.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/785713238eb1
run WPT sequentially on tsan r=jmaher

Comment 3

[Cristian Brindusan [:cbrindusan]]

https://hg.mozilla.org/mozilla-central/rev/785713238eb1