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Issue 778308 link

Starred by 1 user
Status: Duplicate
Merged: issue 778135
Owner:
crouleau@chromium.org
Closed: Oct 2017
Cc:
crouleau@google.com
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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2.6%-122.2% regression in media_perftests at 510769:510909

Project Member Reported by crouleau@google.com, Oct 25 2017 
Looks like some things improved and some things regressed. Caleb was here.
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Oct 25 2017 

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=778308

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=6c04dd5be050d939236ad056ab50d812b917c9f0ccf31f475dedb6b96e306b8d


Bot(s) for this bug's original alert(s):

chromium-rel-win10
chromium-rel-win7-dual
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-nvidia
chromium-rel-win8-dual
Alerts fired for ranges overlapping the given range:
  https://chromeperf.appspot.com/group_report?rev_one=510769&rev_two=[510828, 510828, 510828, 510828, 510828, 510828, 510828, 510828, 510828, 510828, 510828, 510828, 510849, 510849, 510849, 510849, 510849, 510849, 510849, 510849, 510849, 510849, 510849, 510849, 510849, 510864, 510864, 510864, 510864, 510864, 510886, 510886, 510886, 510909, 510909, 510909, 510909, 510909, 510909, 510909, 510909, 510909, 510909, 510909, 510909, 510909, 510909, 510909, 510909, 510909]
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Oct 25 2017

Mergedinto: 778135
Status: Duplicate (was: Assigned)

=== BISECT JOB RESULTS ===
Perf regression found with culprit

Suspected Commit
  Author : Hans Wennborg
  Commit : 22525134c75ca2a005997a717f6887a23af86210
  Date   : Mon Oct 23 17:10:25 2017
  Subject: win: Re-enable Clang by default

Bisect Details
  Configuration: win_8_perf_bisect
  Benchmark    : media_perftests
  Metric       : clockless_playback/sfx_u8.wav
  Change       : 97.77% | 5376.73833071 -> 10633.5191966

Revision             Result                  N
chromium@510776      5376.74 +- 800.554      6      good
chromium@510813      4886.55 +- 490.728      6      good
chromium@510822      5213.34 +- 564.691      6      good
chromium@510823      5568.83 +- 1103.06      6      good
chromium@510824      10655.6 +- 3352.86      6      bad       <--
chromium@510825      9253.64 +- 1940.2       6      bad
chromium@510827      10817.2 +- 1497.71      6      bad
chromium@510831      10088.7 +- 1770.63      6      bad
chromium@510849      10633.5 +- 2689.52      6      bad

To Run This Test
  .\src\out\Release\media_perftests.exe --single-process-tests

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8964742315445565056


For feedback, file a bug with component Speed>Bisection
►

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