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Issue 789710 link

Starred by 1 user
Status: Duplicate
Merged: issue 788341
Owner: ----
Closed: Nov 2017
Cc:
wolenetz@chromium.org
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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2.6% regression in media.mobile at 518573:518611

Project Member Reported by wolenetz@chromium.org, Nov 29 2017 
Alert seems valid, though the delta is small and the regression appears like it may have been undone in the most recent data point. Starting a bisect just in case that most recent data point was noise.
Project Member

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

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=789710

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=08e719170def6da2a9f0ac6ccb3c6541ce45ee3121c019050e6092b612783a07


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

android-nexus7v2
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Nov 30 2017

Mergedinto: 788341
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Bill Budge
  Commit : 0481b23e2562fcb001494de3765a3ef61427fd00
  Date   : Tue Nov 21 16:48:55 2017
  Subject: [Memory] Rewrite platform OS Commit / Uncommit in terms of permissions.

Bisect Details
  Configuration: android_nexus7_perf_bisect
  Benchmark    : media.mobile
  Metric       : memory:chrome:all_processes:reported_by_os:system_memory:native_heap:proportional_resident_size_avg/video.html?src_crowd.ogg_type_audio
  Change       : 5.17% | 16857763.1111 -> 17728912.0

Revision                           Result                   N
chromium@518572                    16857763 +- 990312       9      good
chromium@518573                    16724683 +- 339994       6      good
chromium@518573,v8@a8df8f38a1      16812995 +- 506531       9      good
chromium@518573,v8@8036c41f1e      16908736 +- 1045709      9      good
chromium@518573,v8@0481b23e25      17516197 +- 149990       9      bad       <--
chromium@518574                    17497879 +- 822996       9      bad
chromium@518575                    17423468 +- 336426       9      bad
chromium@518577                    17441928 +- 848054       9      bad
chromium@518582                    17483967 +- 266640       9      bad
chromium@518592                    17352184 +- 548143       9      bad
chromium@518611                    17728912 +- 987678       6      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=video.html.src.crowd.ogg.type.audio media.mobile

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8961553611159853040


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

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