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Issue 648641 link

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Issue metadata

Status: Duplicate
Merged: issue 648644
Owner:
Last visit > 30 days ago
Closed: Sep 2016
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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2.5%-4380.1% regression in smoothness.top_25_smooth at 419034:419106

Project Member Reported by jasontiller@chromium.org, Sep 20 2016

Issue description

See the link to graphs below.
 
Cc: jbau...@chromium.org ericrk@chromium.org
Project Member

Comment 4 by 42576172...@developer.gserviceaccount.com, Sep 21 2016

Mergedinto: 648644
Status: Duplicate (was: Assigned)

===== BISECT JOB RESULTS =====
Status: completed


===== SUSPECTED CL(s) =====
Subject : Enable GPU rasterization on Windows Intel Broadwell and later GPUs.
Author  : jbauman
Commit description:
  
List from
https://cgit.freedesktop.org/vaapi/intel-driver/tree/src/i965_pciids.h

BUG= 646135 
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2337863002
Cr-Commit-Position: refs/heads/master@{#419047}
Commit  : 0ad321336ed38d8a281d2da084013cf1e29b2ce0
Date    : Fri Sep 16 00:16:38 2016


===== TESTED REVISIONS =====
Revision         Mean     Std Dev   N  Good?
chromium@419044  2.9822   0.564007  5  good
chromium@419046  6.2522   4.67383   5  good
chromium@419047  146.536  33.4345   5  bad    <--
chromium@419048  110.61   15.8874   5  bad
chromium@419052  122.804  17.31     5  bad
chromium@419059  130.815  30.2016   5  bad
chromium@419073  143.24   48.662    5  bad
chromium@419105  118.28   11.8961   5  bad

Bisect job ran on: winx64_zen_perf_bisect
Bug ID: 648641

Test Command: src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --also-run-disabled-tests smoothness.top_25_smooth
Test Metric: first_gesture_scroll_update_latency/https___www.google.com__hl_en_q_barack+obama
Relative Change: 3866.19%
Score: 99.9

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/winx64_zen_perf_bisect/builds/486
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9000985322140035968


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5770693373853696

| 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 Tests>AutoBisect.  Thank you!

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