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Issue 760172 link

Starred by 1 user
Status: Duplicate
Merged: issue 758921
Owner: ----
Closed: Aug 2017
Cc:
█ pmeenan@chromium.org
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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1.9%-14.6% regression in smoothness.tough_path_rendering_cases at 496688:497647

Project Member Reported by pmeenan@chromium.org, Aug 29 2017 
See the link to graphs below.
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Aug 29 2017 

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=760172

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=686c18714f4d962163521c872c02895aa0fb828d39a444894fdb42956873ad16


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

android-nexus5
android-nexus5X
android-nexus6
android-one
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Aug 29 2017

Mergedinto: 758921
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Brian White
  Commit : 7662ff8cb53121cd4d8916007d430b36efd45895
  Date   : Thu Aug 24 00:03:13 2017
  Subject: Validate histograms before and after each task on Android.

Bisect Details
  Configuration: android_one_perf_bisect
  Benchmark    : smoothness.tough_path_rendering_cases
  Metric       : frame_times/MotionMark Canvas Fill Shapes
  Change       : 27.34% | 283.727706994 -> 368.042478833

Revision             Result                  N
chromium@496775      283.728 +- 55.1665      8      good
chromium@496843      270.57 +- 2.7225        5      good
chromium@496877      275.136 +- 21.974       5      good
chromium@496878      349.624 +- 44.3414      6      bad       <--
chromium@496879      355.702 +- 34.0644      7      bad
chromium@496880      360.778 +- 47.4973      8      bad
chromium@496882      369.11 +- 37.0197       8      bad
chromium@496886      362.077 +- 29.8825      6      bad
chromium@496894      358.596 +- 60.3699      8      bad
chromium@496911      368.042 +- 42.5676      7      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=MotionMark.Canvas.Fill.Shapes smoothness.tough_path_rendering_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8969912195643211088


For feedback, file a bug with component Speed>Bisection
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