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Issue metadata

Status: Duplicate
Merged: issue 733705
Owner:
Closed: Jun 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: Android
Pri: 3
Type: Bug



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6% regression in smoothness.tough_scrolling_cases at 479057:479277

Project Member Reported by ajuma@chromium.org, Jun 29 2017

Issue description

mean_pixels_checkerboarded regressed by ~6% on Nexus 5X:

https://chromeperf.appspot.com/report?sid=d58b21c9ec0bb185b8ac3e6de3970c71c346427b9ff74d77ee849a94ce58339a

Triggering a bisect.
 
Owner: sunn...@chromium.org
Status: Assigned (was: Available)
Project Member

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

Mergedinto: 733705
Status: Duplicate (was: Assigned)

=== 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_nexus5X_perf_bisect
  Benchmark    : smoothness.tough_scrolling_cases
  Metric       : mean_pixels_checkerboarded/mean_pixels_checkerboarded
  Change       : 6.97% | 41.7066333333 -> 44.6127875

Revision             Result                   N
chromium@479056      41.7066 +- 0.419721      6      good
chromium@479167      42.0418 +- 0.805997      6      good
chromium@479174      42.1084 +- 0.232744      6      good
chromium@479175      44.3487 +- 0.543305      6      bad       <--
chromium@479176      44.2192 +- 0.629446      6      bad
chromium@479178      44.3013 +- 0.566846      6      bad
chromium@479181      44.2213 +- 0.533582      6      bad
chromium@479195      44.3568 +- 0.423291      6      bad
chromium@479222      44.6511 +- 0.744373      6      bad
chromium@479277      44.6128 +- 0.679751      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 smoothness.tough_scrolling_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8975415134338083424


For feedback, file a bug with component Speed>Bisection

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