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Issue metadata

Status: Duplicate
Merged: issue 737495
Owner:
Closed: Jun 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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3.9%-23.7% regression in v8.browsing_mobile at 481826:481898

Project Member Reported by ulan@google.com, Jun 28 2017

Issue description

See the link to graphs below.
 

Comment 2 by u...@chromium.org, Jun 28 2017

Status: Untriaged (was: Assigned)
Project Member

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


=== BISECT JOB RESULTS ===
Perf regression found but unable to narrow commit range

Build failures prevented the bisect from narrowing the range further.


Bisect Details
  Configuration: android_one_perf_bisect
  Benchmark    : v8.browsing_mobile
  Metric       : v8-gc-scavenger_sum/browse_social/browse_social_facebook
  Change       : 13.10% | 362.526666667 -> 404.288777778

Suspected Commit Range
  3 commits in range
  https://chromium.googlesource.com/v8/v8.git/+log/e65aeada27fbf147f5758efe7f7c90f48bd0cae5..1541f422a7f57e5c5eb3c39477f62a75a184f63e


Revision                           Result                  N
chromium@481825                    362.527 +- 39.4687      6        good
chromium@481847                    373.797 +- 43.6246      14       good
chromium@481847,v8@e65aeada27      367.921 +- 43.7959      14       good
chromium@481847,v8@a37f95ff54      ---                     ---      build failure
chromium@481847,v8@116363258d      ---                     ---      build failure
chromium@481847,v8@1541f422a7      381.784 +- 49.9303      14       bad
chromium@481848                    391.178 +- 31.3746      9        bad
chromium@481849                    394.817 +- 45.8314      9        bad
chromium@481850                    393.837 +- 57.031       14       bad
chromium@481853                    398.652 +- 45.9993      9        bad
chromium@481858                    390.209 +- 56.1853      14       bad
chromium@481868                    404.289 +- 55.0508      9        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=browse.social.facebook v8.browsing_mobile

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8975553821215977040

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5701202634866688


| 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 Speed>Bisection.  Thank you!
Project Member

Comment 6 by 42576172...@developer.gserviceaccount.com, Jun 29 2017


=== BISECT JOB RESULTS ===
Bisect failed for unknown reasons

Please contact the team (see below) and report the error.


Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : v8.browsing_mobile
  Metric       : v8-gc-scavenger_sum/browse_social/browse_social_instagram


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=browse.social.instagram v8.browsing_mobile

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8975451726261251808

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5264661085159424


| 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 Speed>Bisection.  Thank you!
Project Member

Comment 8 by 42576172...@developer.gserviceaccount.com, Jun 29 2017


=== BISECT JOB RESULTS ===
Bisect failed for unknown reasons

Please contact the team (see below) and report the error.


Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : v8.browsing_mobile
  Metric       : v8-gc-scavenger_sum/browse_social/browse_social_instagram


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=browse.social.instagram v8.browsing_mobile

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8975448907251001600

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5264661085159424


| 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 Speed>Bisection.  Thank you!
Project Member

Comment 9 by 42576172...@developer.gserviceaccount.com, Jun 29 2017

Mergedinto: 737495
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Michael Lippautz
  Commit : 07b1113252bd487aa20d6459e03d125edf6d5e47
  Date   : Fri Jun 23 08:35:51 2017
  Subject: [heap] Move first-level on Scavenger to instance-based visitor

Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : v8.browsing_mobile
  Metric       : v8-gc-scavenger_sum/browse_social/browse_social_instagram
  Change       : 8.69% | 269.964666667 -> 293.437166667

Revision                           Result                  N
chromium@481845                    269.965 +- 11.7209      6      good
chromium@481847                    279.792 +- 13.5388      9      good
chromium@481847,v8@e65aeada27      274.413 +- 13.7938      6      good
chromium@481847,v8@1541f422a7      275.238 +- 8.36415      6      good
chromium@481847,v8@07b1113252      290.019 +- 15.4302      6      bad       <--
chromium@481847,v8@a7e622ba33      290.958 +- 11.152       6      bad
chromium@481848                    293.8 +- 9.874          6      bad
chromium@481849                    290.575 +- 11.9888      6      bad
chromium@481852                    292.02 +- 8.59865       6      bad
chromium@481859                    293.177 +- 11.3692      6      bad
chromium@481872                    290.012 +- 9.63366      6      bad
chromium@481898                    293.437 +- 12.8774      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=browse.social.instagram v8.browsing_mobile

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8975452724792790192


For feedback, file a bug with component Speed>Bisection

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