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Issue 735935 link

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Issue metadata

Status: Duplicate
Merged: issue 735071
Owner: ----
Closed: Jun 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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3.8% regression in system_health.common_desktop at 480340:480380

Project Member Reported by kraynov@chromium.org, Jun 22 2017

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=735935

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgjoLquQkM


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

chromium-rel-mac11-pro
Project Member

Comment 4 by 42576172...@developer.gserviceaccount.com, Jun 22 2017

Mergedinto: 735071
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Yutaka Hirano
  Commit : 84047549ac37bab70d7306566c912e59131f3e1f
  Date   : Mon Jun 19 04:16:15 2017
  Subject: [Loading] Save one post-task when the data pipe is ready on arrival

Bisect Details
  Configuration: mac_pro_perf_bisect
  Benchmark    : system_health.common_desktop
  Metric       : cpu_time_percentage_avg/load_tools/load_tools_weather
  Change       : 3.70% | 0.50812144733 -> 0.526920262421

Revision             Result                      N
chromium@480339      0.508121 +- 0.00894327      6      good
chromium@480341      0.50973 +- 0.00666579       6      good
chromium@480342      0.52915 +- 0.00986836       6      bad       <--
chromium@480345      0.529864 +- 0.0118693       6      bad
chromium@480350      0.526335 +- 0.00770114      6      bad
chromium@480360      0.529439 +- 0.00505589      6      bad
chromium@480380      0.52692 +- 0.0187119        6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=load.tools.weather system_health.common_desktop

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8976083391140340864

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=6747284080951296


| 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!
Project Member

Comment 5 by 42576172...@developer.gserviceaccount.com, Jun 22 2017


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

Suspected Commit
  Author : Yutaka Hirano
  Commit : 84047549ac37bab70d7306566c912e59131f3e1f
  Date   : Mon Jun 19 04:16:15 2017
  Subject: [Loading] Save one post-task when the data pipe is ready on arrival

Bisect Details
  Configuration: mac_pro_perf_bisect
  Benchmark    : system_health.common_desktop
  Metric       : cpu_time_percentage_avg/load_tools/load_tools_weather
  Change       : 3.33% | 0.515594243083 -> 0.532737892812

Revision             Result                      N
chromium@480339      0.515594 +- 0.0116655       6      good
chromium@480341      0.509819 +- 0.0120922       6      good
chromium@480342      0.529699 +- 0.00693132      6      bad       <--
chromium@480345      0.528907 +- 0.00535142      6      bad
chromium@480350      0.529168 +- 0.00791972      6      bad
chromium@480360      0.532695 +- 0.0102829       6      bad
chromium@480380      0.532738 +- 0.00517203      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=load.tools.weather system_health.common_desktop

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8976083384583209552

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5258934484467712


| 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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