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Issue metadata

Status: Duplicate
Merged: issue 681541
Owner: ----
Closed: Jan 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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18.5% regression in v8.mobile_infinite_scroll_tbmv2 at 443354:443443

Project Member Reported by nzolghadr@chromium.org, Jan 16 2017

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=681654

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgwIflowkM


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

android-nexus5
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Jan 17 2017

Mergedinto: 681541
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : mvstanton
  Commit : b8294aaa978e972978b8d82cedf63befad5d7af1
  Date   : Thu Jan 12 11:29:09 2017
  Subject: [TypeFeedbackVector] Root literal arrays in function literals slots

Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : v8.mobile_infinite_scroll_tbmv2
  Metric       : v8-gc-scavenger_max/v8-gc-scavenger_max
  Change       : 12.73% | 36.616125 -> 41.275875

Revision                           Result                  N
chromium@443353                    36.6161 +- 2.77805      6      good
chromium@443398                    36.7882 +- 3.50541      6      good
chromium@443400                    36.8842 +- 5.02569      8      good
chromium@443400,v8@2bca05685f      37.7729 +- 6.20743      9      good
chromium@443400,v8@b8294aaa97      41.5633 +- 2.61096      6      bad       <--
chromium@443400,v8@81c62e070b      41.9242 +- 1.56059      6      bad
chromium@443400,v8@9884fb91e1      41.8125 +- 4.0065       6      bad
chromium@443400,v8@aa75904e3c      40.8743 +- 3.93958      9      bad
chromium@443401                    41.3988 +- 4.89724      6      bad
chromium@443404                    41.3207 +- 3.47445      6      bad
chromium@443410                    40.3468 +- 2.58809      6      bad
chromium@443421                    41.2504 +- 2.00489      6      bad
chromium@443443                    41.2759 +- 3.54379      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 v8.mobile_infinite_scroll_tbmv2

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8990282808197371280

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5860458919100416


| O O | Visit http://www.chromium.org/developers/speed-infra/perf-bug-faq
|  X  | for more information addressing perf regression bugs. For feedback,
| / \ | file a bug with component Tests>AutoBisect.  Thank you!

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