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Issue 637957 link

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Issue metadata

Status: Duplicate
Merged: issue 635464
Owner:
Closed: Aug 2016
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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9.7% regression in media.tough_video_cases at 410148:410175

Project Member Reported by liber...@chromium.org, Aug 15 2016

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=637957

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg1q6muwoM


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

chromium-rel-mac10
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Aug 16 2016

Mergedinto: 635464
Status: Duplicate (was: Assigned)

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


===== SUSPECTED CL(s) =====
Subject : Reland #1: "base: Implement GetCurrentThreadPriority."
Author  : erikchen
Commit description:
  
The Chrome thread priority is saved in the thread dictionary during
SetCurrentThreadPriority(). This seemed a better approach than using
thread_policy_get(), since there are 4 Chrome priorities which won't cleanly map
to thread flavors.

BUG=601270

Review-Url: https://codereview.chromium.org/2215513002
Cr-Commit-Position: refs/heads/master@{#410163}
Commit  : 23d10a36f2e815edd610098a65e5890f279d2183
Date    : Fri Aug 05 21:19:08 2016


===== TESTED REVISIONS =====
Revision         Mean     Std Dev  N  Good?
chromium@410147  344.0    3.16228  8  good
chromium@410161  341.4    4.97996  5  good
chromium@410162  348.8    3.83406  5  good
chromium@410163  376.4    13.5204  5  bad    <--
chromium@410165  379.6    3.78153  5  bad
chromium@410168  377.4    8.6487   5  bad
chromium@410175  371.125  13.6532  8  bad

Bisect job ran on: mac_10_10_perf_bisect
Bug ID: 637957

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --also-run-disabled-tests media.tough_video_cases
Test Metric: idle_wakeups_gpu/idle_wakeups_gpu
Relative Change: 7.21%
Score: 99.5

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_10_10_perf_bisect/builds/2300
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9004226444603478688


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5880231701774336

| 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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