Bug 207839

Summary:	[ Mac wk2 ] webgpu/whlsl/loops-break.html is flaky failing.
Product:	WebKit	Reporter:	Jason Lawrence <Lawrence.j>
Component:	WebGPU	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Mac
OS:	macOS 10.15

Description Jason Lawrence 2020-02-17 08:07:38 PST

webgpu/whlsl/loops-break.html

Description:
This test is flaky failing on Mac wk2. It is flaky failing throughout the visible history, the oldest diff that I'm able to locate (r254260) matches the current diff.

History:
https://results.webkit.org/?suite=layout-tests&test=webgpu%2Fwhlsl%2Floops-break.html&limit=50000


Diff:
https://build.webkit.org/results/Apple-Catalina-Release-WK2-Tests/r256728%20(2989)/webgpu/whlsl/loops-break-diff.png

Comment 1 Radar WebKit Bug Importer 2020-02-17 08:08:17 PST

<rdar://problem/59510926>

Comment 2 Jason Lawrence 2020-02-17 08:17:38 PST

I have marked this test as failing while this issue is being investigated.

Comment 3 Jason Lawrence 2020-02-17 17:10:34 PST

I am able to reproduce this issue with r256774 using the command below.
run-webkit-tests webgpu/whlsl/loops-break.html --iterations 3000 --exit-after-n-failures 5 -g

[57/3000] webgpu/whlsl/loops-break.html failed unexpectedly (reference mismatch)
[344/3000] webgpu/whlsl/loops-break.html failed unexpectedly (reference mismatch)
[597/3000] webgpu/whlsl/loops-break.html failed unexpectedly (reference mismatch)
[617/3000] webgpu/whlsl/loops-break.html failed unexpectedly (reference mismatch)
[705/3000] webgpu/whlsl/loops-break.html failed unexpectedly (reference mismatch)
Exiting early after 5 failures. 705 tests run.

700 tests ran as expected, 5 didn't (2295 didn't run):