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Issue 765620 link

Starred by 2 users

Issue metadata

Status: Fixed
Owner:
Closed: Sep 2017
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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1.9% regression in kraken at 501594:501657

Project Member Reported by toyoshim@chromium.org, Sep 15 2017

Issue description

See the link to graphs below.
 
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Sep 15 2017

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=765620

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=06169c71295472df3b5c21e39f509237b6c40d9761f008abdc74e1bf86a44a94


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

chromium-rel-win7-gpu-intel
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Sep 15 2017

Cc: jarin@chromium.org
Owner: jarin@chromium.org
Status: Assigned (was: Untriaged)

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

Hi jarin@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 : Jaroslav Sevcik
  Commit : 14b424c3088d4e451eecd94320faf52355faaad1
  Date   : Wed Sep 13 12:32:50 2017
  Subject: [turbofan] Lower monomorphic loads during graph building.

Bisect Details
  Configuration: winx64intel_perf_bisect
  Benchmark    : kraken
  Metric       : Total/Total
  Change       : 1.68% | 1075.16666667 -> 1093.23333333

Revision                           Result                  N
chromium@501593                    1075.17 +- 9.23219      6      good
chromium@501625                    1076.05 +- 5.15315      6      good
chromium@501641                    1077.48 +- 10.0682      6      good
chromium@501649                    1075.68 +- 4.82373      6      good
chromium@501653                    1076.95 +- 2.3484       6      good
chromium@501653,v8@bc69f3450b      1075.15 +- 7.38207      6      good
chromium@501653,v8@14b424c308      1091.65 +- 9.50973      6      bad       <--
chromium@501654                    1093.55 +- 9.27766      6      bad
chromium@501655                    1093.3 +- 8.27285       6      bad
chromium@501657                    1093.23 +- 6.97233      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 kraken

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8968386689349170192


For feedback, file a bug with component Speed>Bisection

Comment 4 by jarin@chromium.org, Sep 18 2017

Status: Fixed (was: Assigned)
Reverted (7540e841fadb828b14b82d5fbd3fc478654f7ad9).
Project Member

Comment 5 by 42576172...@developer.gserviceaccount.com, Sep 19 2017

Cc: alexclarke@chromium.org
 Issue 766528  has been merged into this issue.

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