New issue
Advanced search Search tips
Note: Color blocks (like █ or █) mean that a user may not be available. Tooltip shows the reason.

Issue 762181 link

Starred by 1 user
Status: Duplicate
Merged: issue 760966
Owner: ----
Closed: Sep 2017
Cc:
█ briander...@chromium.org
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



Sign in to add a comment

2.5%-73.8% regression in smoothness.top_25_smooth at 498363:498746

Project Member Reported by briander...@chromium.org, Sep 5 2017 
See the link to graphs below.
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Sep 5 2017 

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=762181

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=b12be5983a4d38859591b8ac33c8c7bfd4295079a2c3aa9b3e53793278a38d1b


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
win-high-dpi
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Sep 6 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: 1d13b71466c83b6e72adc6860fae78c439f55e5f
  bad_revision : c7a7949c958b4867600ca716968da430fd9b952f

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


Bisect Details
  Configuration: mac_10_12_mini_8gb_perf_bisect
  Benchmark    : smoothness.top_25_smooth
  Metric       : mean_input_event_latency/Weather.com

Revision             Result                  N
chromium@498500      13.0436 +- 5.20264      14      good
chromium@498577      13.0536 +- 4.30144      14      good
chromium@498616      13.9838 +- 4.05301      14      good
chromium@498635      14.5337 +- 2.7174       21      good
chromium@498640      21.5324 +- 19.1738      14      bad
chromium@498645      21.6016 +- 16.8674      14      bad
chromium@498654      20.6164 +- 17.7758      14      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=Weather.com smoothness.top_25_smooth

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8969257272671356720


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

Comment 5 by 42576172...@developer.gserviceaccount.com, Sep 6 2017

Mergedinto: 760966
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Sunny Sachanandani
  Commit : c7a7949c958b4867600ca716968da430fd9b952f
  Date   : Wed Aug 30 22:21:33 2017
  Subject: cc: Flush command buffers when all tiles are done.

Bisect Details
  Configuration: mac_10_12_mini_8gb_perf_bisect
  Benchmark    : smoothness.top_25_smooth
  Metric       : mean_input_event_latency/Weather.com
  Change       : 56.41% | 14.0805 -> 22.023

Revision             Result                  N
chromium@498635      14.0805 +- 1.40407      6      good
chromium@498638      13.3543 +- 2.18574      6      good
chromium@498639      13.4278 +- 2.51785      6      good
chromium@498640      22.023 +- 8.00587       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=Weather.com smoothness.top_25_smooth

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8969194806814102224


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

Sign in to add a comment