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Issue metadata

Status: Duplicate
Merged: issue 681570
Owner: ----
Closed: Jan 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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26% regression in scheduler.tough_scheduling_cases at 443315:443393

Project Member Reported by nzolghadr@chromium.org, Jan 16 2017

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=681647

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgoMbaoAoM


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

chromium-rel-win10
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Jan 17 2017

Mergedinto: 681570
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : reed
  Commit : ae7d8e56c8cc244b4ca0ae692b76e662c2563329
  Date   : Thu Jan 12 21:28:46 2017
  Subject: use SkRasterHandleAllocator to support GDI drawing in SkCanvas

Bisect Details
  Configuration: winx64_10_perf_bisect
  Benchmark    : scheduler.tough_scheduling_cases
  Metric       : mean_input_event_latency/mean_input_event_latency
  Change       : 21.07% | 6.08790555556 -> 7.37078333333

Revision             Result                   N
chromium@443314      6.08791 +- 0.737169      6      good
chromium@443354      6.12516 +- 0.636855      6      good
chromium@443364      5.92144 +- 1.06499       6      good
chromium@443365      7.58197 +- 0.656392      6      bad       <--
chromium@443366      7.65703 +- 1.64039       6      bad
chromium@443367      7.69698 +- 0.500229      6      bad
chromium@443369      7.48477 +- 1.38671       6      bad
chromium@443374      7.79135 +- 1.3876        6      bad
chromium@443393      7.37078 +- 1.47178       6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests scheduler.tough_scheduling_cases

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8990283213859910880

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=4998922705043456


| 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 Tests>AutoBisect.  Thank you!

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