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Issue 750753 link

Starred by 1 user
Status: Duplicate
Merged: issue 750851
Owner: ----
Closed: Aug 2017
Cc:
█ kou...@chormium.org
ksakamoto@chromium.org
majidvp@chromium.org
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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3.9%-268.8% regression in loading.desktop at 489888:490089

Project Member Reported by majidvp@google.com, Jul 31 2017 
Most likely caused by switching WPRGo on.
The change causes some sites to be served on HTTP/2
instead of HTTP 1.0 which may be affecting these.


i.e., issue 750299
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Jul 31 2017 

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=750753

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=c665d63860a73369881e1c409f8ac4bfe650e46c5d571aed08783c91253b2297


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

chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-mac11-air
chromium-rel-mac11-pro
chromium-rel-mac12
chromium-rel-mac12-mini-8gb

Comment 3 by majidvp@chromium.org, Jul 31 2017 

nvm #1, WPRGo was enabled for mobile system health in that range so probably unrelated.
Project Member

Comment 4 by 42576172...@developer.gserviceaccount.com, Aug 1 2017 


=== BISECT JOB RESULTS ===
Bisect was unable to run to completion

Error: INFRA_FAILURE

The bisect was able to narrow the range, you can try running with:
  good_revision: 16aacd97378a2956fc6ac97a173d3c78dc8e5038
  bad_revision : dde1afca9fb6b691f8bdc42a92051a7d1ccdcbda

If failures persist contact the team (see below) and report the error.


Bisect Details
  Configuration: mac_10_12_mini_8gb_perf_bisect
  Benchmark    : loading.desktop
  Metric       : timeToFirstMeaningfulPaint_avg/pcv1-cold/FarsNews

Revision             Result                  N
chromium@489887      1233.39 +- 2767.75      9      good
chromium@489921      831.52 +- 214.197       5      good
chromium@489938      953.367 +- 634.398      6      good
chromium@489947      3729.84 +- 2139.64      6      bad
chromium@489955      3203.65 +- 4144.31      9      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=FarsNews loading.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8972531659246193648


For feedback, file a bug with component Speed>Bisection
Project Member

Comment 8 by 42576172...@developer.gserviceaccount.com, Aug 22 2017

Mergedinto: 750851
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Ken Buchanan
  Commit : aaf6b58123e9bc49391a8f8cfe057b7c3269e9ef
  Date   : Thu Jul 27 15:46:12 2017
  Subject: Ensure overlapping compositor locks can time out

Bisect Details
  Configuration: mac_air_perf_bisect
  Benchmark    : loading.desktop
  Metric       : cpuTimeToFirstMeaningfulPaint_avg/pcv1-warm/Haraj
  Change       : 87.27% | 214.995166667 -> 402.617166667

Revision             Result                  N
chromium@489897      214.995 +- 6.63926      6      good
chromium@489920      216.9 +- 7.25847        6      good
chromium@489932      214.882 +- 9.82069      6      good
chromium@489938      219.565 +- 23.7172      6      good
chromium@489941      215.671 +- 7.93292      6      good
chromium@489942      374.028 +- 170.752      6      bad       <--
chromium@489943      372.118 +- 167.614      6      bad
chromium@489988      372.872 +- 169.319      6      bad
chromium@490078      402.617 +- 12.3235      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=Haraj loading.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8970612943720663616


For feedback, file a bug with component Speed>Bisection
Project Member

Comment 9 by 42576172...@developer.gserviceaccount.com, Aug 22 2017 


=== BISECT JOB RESULTS ===
NO Perf regression found

Bisect Details
  Configuration: mac_air_perf_bisect
  Benchmark    : loading.desktop
  Metric       : timeToFirstMeaningfulPaint_avg/pcv1-cold/ArsTechnica

Revision             Result                  N
chromium@489897      458.533 +- 219.867      21      good
chromium@490078      551.258 +- 611.573      21      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=ArsTechnica loading.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8970612940477266464


For feedback, file a bug with component Speed>Bisection
Project Member

Comment 10 by 42576172...@developer.gserviceaccount.com, Aug 22 2017 


=== BISECT JOB RESULTS ===
Bisect was unable to run to completion

Error: INFRA_FAILURE

The bisect was able to narrow the range, you can try running with:
  good_revision: 16aacd97378a2956fc6ac97a173d3c78dc8e5038
  bad_revision : dde1afca9fb6b691f8bdc42a92051a7d1ccdcbda

If failures persist contact the team (see below) and report the error.


Bisect Details
  Configuration: mac_10_12_mini_8gb_perf_bisect
  Benchmark    : loading.desktop
  Metric       : timeToFirstMeaningfulPaint_avg/pcv1-cold/FarsNews

Revision             Result                  N
chromium@489887      1041.13 +- 854.036      9       good
chromium@489921      1095.81 +- 863.867      9       good
chromium@489938      1267.76 +- 3373.08      9       good
chromium@489947      3521.14 +- 4100.07      14      bad
chromium@489955      3657.57 +- 2903.99      8       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=FarsNews loading.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8970612929084186464


For feedback, file a bug with component Speed>Bisection
►

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