Bug 207599 – [ Mac wk2 ] webgpu/whlsl/do-while-loop.html is flaky failing.

• Status: NEW
• Component: WebGPU

[Jason Lawrence]

webgpu/whlsl/do-while-loop.html

Description:
This test is flaky failing throughout the visible history on Mac wk2. The oldest diff that I am able to find, related to r253677, shows the same image and percentage. 

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

Diff:
https://build.webkit.org/results/Apple-Catalina-Release-WK2-Tests/r254422%20(2065)/webgpu/whlsl/do-while-loop-diff.png

[Radar WebKit Bug Importer]

<rdar://problem/59369220>

[Jason Lawrence]

I have marked this test as failing while the issue is investigated.
https://trac.webkit.org/changeset/256398/webkit

[Jason Lawrence]

I am able to reproduce this issue with r256430 using the command below.

run-webkit-tests webgpu/whlsl/do-while-loop.html --iterations 5000.

Running 6 WebKitTestRunners in parallel.
[792/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch)
[1214/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch)
[1999/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch)
[2101/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch)
[2483/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch)
[2771/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch)
[3550/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch)
[3680/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch)
[3962/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch)
[4803/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch)
[4924/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch)