197207 2019-04-23 12:36:22 -0700 REGRESSION: (r244182) Layout Test http/wpt/resource-timing/rt-resources-per-frame.html is failing 2019-06-03 18:38:40 -0700 1 1 1 Unclassified WebKit Tools / Tests WebKit Nightly Build Unspecified Unspecified RESOLVED CONFIGURATION CHANGED https://bugs.webkit.org/show_bug.cgi?id=177484 InRadar P2 Normal --- 1 tsavell webkit-unassigned lforschler rniwa ryanhaddad sabouhallawa sroberts webkit-bug-importer oldest_to_newest 1529687 0 tsavell 2019-04-23 12:36:22 -0700 The following layout test is failing on Mac http/wpt/resource-timing/rt-resources-per-frame.html Probable cause: This failure started with 244182. I was able to confirm locally with: run-webkit-tests --root debug-244182 http/wpt/resource-timing/rt-resources-per-frame.html --iterations 1000 -f --debug Flakiness Dashboard: https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=http%2Fwpt%2Fresource-timing%2Frt-resources-per-frame.html Diff: --- /Volumes/Data/slave/highsierra-debug-tests-wk2/build/layout-test-results/http/wpt/resource-timing/rt-resources-per-frame-expected.txt +++ /Volumes/Data/slave/highsierra-debug-tests-wk2/build/layout-test-results/http/wpt/resource-timing/rt-resources-per-frame-actual.txt @@ -1,7 +1,6 @@ Resource Timing: Entries per Frame -PASS main frame resources differ from other frames -PASS iframe1 resources differ from other frames -PASS iframe2 resources differ from other frames +Harness Error (TIMEOUT), message = null + 1529689 1 webkit-bug-importer 2019-04-23 12:37:15 -0700 <rdar://problem/50140085> 1529910 2 rniwa 2019-04-23 21:10:25 -0700 That's very strange. This test is nothing to do with rAF... 1530409 3 sroberts 2019-04-25 10:08:18 -0700 Was able to reproduce in iOS Simulator in r244182, but not r244181. Marked flaky in https://trac.webkit.org/changeset/244650/webkit 1530469 4 sabouhallawa 2019-04-25 11:56:55 -0700 (In reply to Ryosuke Niwa from comment #2) > That's very strange. This test is nothing to do with rAF... The test load three resources through the windows of the main and the two sub-frames. But it has to wait before requesting the load. Do you know why we have to: wait(); // Ensure a DOMHighResTimeStamp change. before making the load request? 1532179 5 rniwa 2019-05-01 18:40:42 -0700 (In reply to Said Abou-Hallawa from comment #4) > (In reply to Ryosuke Niwa from comment #2) > > That's very strange. This test is nothing to do with rAF... > > The test load three resources through the windows of the main and the two > sub-frames. But it has to wait before requesting the load. Do you know why > we have to: > > wait(); // Ensure a DOMHighResTimeStamp change. > > before making the load request? We want to make sure performance.now() changes because the test depends on performance.now value being different beyond that point. 1541424 6 sabouhallawa 2019-06-03 18:38:40 -0700 Flakiness dashboard shows that the test has been passing for the last week and half. With the trunk WebKit I can't reproduce the test flakiness.