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Issue 735687 link

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Issue metadata

Status: Duplicate
Merged: issue 733705
Owner: ----
Closed: Jun 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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3.7%-6.4% regression in thread_times.simple_mobile_sites at 479147:479299

Project Member Reported by lanwei@chromium.org, Jun 21 2017

Issue description

See the link to graphs below.
 

Comment 1 by lanwei@chromium.org, Jun 21 2017

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=735687

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg9pexpAsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg9rnm2gsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgtoqo4goM


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

android-nexus5
chromium-rel-mac12
chromium-rel-mac12-mini-8gb
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Jun 22 2017

Mergedinto: 733705
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Sunny Sachanandani
  Commit : f9a0da96d26ec1fe2121a8eef62f7bd7e9330555
  Date   : Tue Jun 13 22:16:40 2017
  Subject: Enable gpu scheduler on waterfall and developer builds.

Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : thread_times.simple_mobile_sites
  Metric       : thread_GPU_cpu_time_per_frame/thread_GPU_cpu_time_per_frame
  Change       : 8.22% | 2.90154725542 -> 3.14012512893

Revision             Result                    N
chromium@479146      2.90155 +- 0.0712824      6      good
chromium@479172      2.9568 +- 0.107401        6      good
chromium@479174      2.91545 +- 0.0819931      6      good
chromium@479175      3.11606 +- 0.0838908      6      bad       <--
chromium@479176      3.11643 +- 0.070494       6      bad
chromium@479179      3.10201 +- 0.0904715      6      bad
chromium@479185      3.11175 +- 0.0741606      6      bad
chromium@479198      3.10566 +- 0.0372047      6      bad
chromium@479249      3.14013 +- 0.0747323      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 thread_times.simple_mobile_sites

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8976140125548231616

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=6473339842854912


| 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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