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Issue metadata

Status: Duplicate
Merged: issue 726902
Owner: ----
Closed: Jun 2017
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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12.2% regression in v8.runtimestats.browsing_mobile_classic at 474288:474399

Project Member Reported by tebbi@chromium.org, Jun 16 2017

Issue description

See the link to graphs below.
 

Comment 1 by tebbi@chromium.org, Jun 16 2017

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=734032

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDght2wqwoM


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

android-nexus6
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Jun 16 2017

Mergedinto: 726902
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : fdoray
  Commit : b87bcfb8c3b17bbcad020186a94e935e2fd0d162
  Date   : Wed May 24 17:49:40 2017
  Subject: [reland] Use TaskScheduler instead of WorkerPool in v8_platform.cc.

Bisect Details
  Configuration: android_nexus6_perf_bisect
  Benchmark    : v8.runtimestats.browsing_mobile_classic
  Metric       : Optimize:duration_avg/browse_media/browse_media_youtube
  Change       : 6.24% | 397.312111111 -> 422.103222222

Revision             Result                  N
chromium@474287      397.312 +- 49.0816      9       good
chromium@474343      395.812 +- 40.3336      9       good
chromium@474345      349.883 +- 371.653      9       good
chromium@474346      415.768 +- 48.4169      9       bad       <--
chromium@474347      425.486 +- 77.4689      14      bad
chromium@474350      436.657 +- 34.6227      9       bad
chromium@474357      428.02 +- 25.886        6       bad
chromium@474371      444.06 +- 32.4102       6       bad
chromium@474399      422.103 +- 37.7924      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.media.youtube v8.runtimestats.browsing_mobile_classic

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8976631586105804992

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5515543160815616


| 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!

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