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loading.desktop/AllRecipes_cold in performance_test_suite failing on chromium.perf/Win 7 Perf

Project Member Reported by sheriff-...@appspot.gserviceaccount.com, Sep 11

Issue description

Filed by sheriff-o-matic@appspot.gserviceaccount.com on behalf of charliea@chromium.org

loading.desktop/AllRecipes_cold in performance_test_suite failing on chromium.perf/Win 7 Perf

Builders failed on: 
- Win 7 Perf: 
  https://ci.chromium.org/buildbot/chromium.perf/Win%207%20Perf

Failure looks like:

(ERROR) 2018-08-23 15:19:22,967 story_runner.ProcessError:100  Handleable error
Traceback (most recent call last):
  File "c:\b\s\w\ir\third_party\catapult\telemetry\telemetry\internal\story_runner.py", line 126, in _RunStoryAndProcessErrorIfNeeded
    state.RunStory(results)
  File "c:\b\s\w\ir\third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py", line 75, in traced_function
    return func(*args, **kwargs)
  File "c:\b\s\w\ir\third_party\catapult\telemetry\telemetry\page\shared_page_state.py", line 300, in RunStory
    self._current_page.Run(self)
  File "c:\b\s\w\ir\third_party\catapult\telemetry\telemetry\page\__init__.py", line 99, in Run
    self.RunPageInteractions(action_runner)
  File "c:\b\s\w\ir\tools\perf\page_sets\page_cycler_story.py", line 41, in RunPageInteractions
    _WEB_CONTENTS_TIMEOUT)
  File "c:\b\s\w\ir\third_party\catapult\common\py_utils\py_utils\__init__.py", line 148, in WaitFor
    (timeout, GetConditionString()))

Looks like it's timing out waiting for quiescence.

Approximate good revision is  r584948, first failure is r585471. Going to kick off a bisect to see if we can find the culprit.

 
Cc: hansberry@chromium.org
Owner: hansberry@chromium.org
Status: Assigned (was: Available)
📍 Found a significant difference after 1 commit.
https://pinpoint-dot-chromeperf.appspot.com/job/17cbfd9b640000

[CrOS Multidevice] Authenticate user before enabling some features. by hansberry@chromium.org
https://chromium.googlesource.com/chromium/src/+/56d3d720c25268184350c8830c6c9776abcd652e
0.8 → 0.1 (-0.7)

Understanding performance regressions:
  http://g.co/ChromePerformanceRegressions

Benchmark documentation link:
  https://bit.ly/loading-benchmarks
Hi Ryan,

It looks like the above CL broke some Chrome loading benchmarks. Is it safe to revert while you investigate the cause of the failure?
Cc: jlklein@chromium.org khorimoto@chromium.org jhawkins@chromium.org
Owner: charliea@chromium.org
+khorimoto@,jlklein@,jhawkins@

Hi Charlie -- please don't revert this CL. This commit should only affect Chrome OS, not Windows. All previous changes to these files have not produced this type of issue, so I'm certain this is some sort of flake in the tool, or it's pinpointing the wrong culprit CL. If you have reason to believe I'm incorrect here, I can try to help you investigate the issue, but I'm unfamiliar with this tool / performance testing infra. Thanks!

Hi Ryan,

Rerunning the job now to double check its findings.
📍 Couldn't reproduce a difference.
https://pinpoint-dot-chromeperf.appspot.com/job/132ab8e3640000
I couldn't tell from your link what actual test is broken. Can you help us understand?

I've audited the change, and the files in the CL are all HTML/CSS/JS which are included in [1]. However, all of those files are wrapped in a "<if expr="chromeos">" tag, so I don't see how this could regress Windows performance.

[1] https://cs.chromium.org/chromium/src/chrome/browser/resources/settings/settings_resources.grd
Hi khorimoto@,

Based on hansberry@'s comment, I wouldn't worry about this too much until we can actually reproduce the bisect that initially led us to believe it was their CL. It sounds like this is more likely than not a flake.
📍 Couldn't reproduce a difference.
https://pinpoint-dot-chromeperf.appspot.com/job/157bc1e3640000

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