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Issue 739320 link

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Issue metadata

Status: WontFix
Owner:
Closed: Jul 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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11.5%-23.4% regression in scheduler.tough_scheduling_cases at 483965:484027

Project Member Reported by rmcilroy@chromium.org, Jul 5 2017

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=739320

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg3sKfoQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg3siCrgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg3pLWoAoM


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

android-nexus6
chromium-rel-win7-dual
chromium-rel-win8-dual
Cc: skyos...@chromium.org
Owner: skyos...@chromium.org

=== Auto-CCing suspected CL author skyostil@chromium.org ===

Hi skyostil@chromium.org, the bisect results pointed to your CL, please take a look at the
results.


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

Suspected Commit
  Author : Sami Kyostila
  Commit : 56398249f62df4942576ebbaec482d6fd8cea9a7
  Date   : Mon Jul 03 15:26:15 2017
  Subject: Remove synthetic delay framework

Bisect Details
  Configuration: android_nexus6_perf_bisect
  Benchmark    : scheduler.tough_scheduling_cases
  Metric       : queueing_durations/queueing_durations
  Change       : 19.81% | 0.180680345613 -> 0.216467259911

Revision             Result                      N
chromium@483964      0.18068 +- 0.0026641        5      good
chromium@483993      0.180065 +- 0.0106625       5      good
chromium@484000      0.178629 +- 0.00384298      6      good
chromium@484004      0.183578 +- 0.00769363      5      good
chromium@484005      0.175309 +- 0.0113776       6      good
chromium@484006      0.218518 +- 0.0175891       6      bad       <--
chromium@484007      0.219147 +- 0.0146347       6      bad
chromium@484021      0.216467 +- 0.0176498       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 scheduler.tough_scheduling_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8974916428263634144


For feedback, file a bug with component Speed>Bisection
Status: WontFix (was: Untriaged)
Benchmarking change, not a real regression :)

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