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Issue 760177 link

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Issue metadata

Status: Duplicate
Merged: issue 759554
Owner: ----
Closed: Aug 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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6.7%-30.3% regression in thread_times.simple_mobile_sites at 497554:497661

Project Member Reported by pmeenan@chromium.org, Aug 29 2017

Issue description

See the link to graphs below.
 
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Aug 29 2017

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=760177

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=0d9513bce1b50621e7c623c36f103604b20302f71c105ce09e1f6bf91ea0e077


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

android-nexus7v2
android-webview-nexus6
Project Member

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

Mergedinto: 759554
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Sunny Sachanandani
  Commit : 9b8fb34db903643b759635086dcf0da90b1e3082
  Date   : Sat Aug 26 00:49:56 2017
  Subject: gpu: Command buffer multi flush.

Bisect Details
  Configuration: android_nexus7_perf_bisect
  Benchmark    : thread_times.simple_mobile_sites
  Metric       : thread_GPU_cpu_time_per_frame/http___m.nytimes.com_
  Change       : 20.84% | 2.01723314457 -> 2.43769266984

Revision             Result                    N
chromium@497557      2.01723 +- 0.0622434      6      good
chromium@497607      1.9265 +- 0.049623        6      good
chromium@497614      1.85368 +- 0.0376631      6      good
chromium@497615      2.39029 +- 0.0344551      6      bad       <--
chromium@497616      2.38526 +- 0.0303563      6      bad
chromium@497617      2.40587 +- 0.142315       6      bad
chromium@497620      2.40457 +- 0.1271         6      bad
chromium@497632      2.50135 +- 0.0254768      6      bad
chromium@497657      2.43769 +- 0.130539       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=http...m.nytimes.com. thread_times.simple_mobile_sites

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8969912113320031488


For feedback, file a bug with component Speed>Bisection

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