All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=648894

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgudWTqgkM


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

android-galaxy-s5

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9000921735264506512

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


=== Bisection aborted ===
The bisect was aborted because The metric values for the initial "good" and "bad" revisions do not represent a clear regression.
Please contact the the team (see below) if you believe this is in error.

=== Warnings ===
The following warnings were raised by the bisect job:

 * Bisect failed to reproduce the regression with enough confidence.

===== TESTED REVISIONS =====
Revision         Mean     Std Dev  N   Good?
chromium@418836  13.38    2.04194  18  good
chromium@418866  13.7288  1.46115  18  bad

Bisect job ran on: android_s5_perf_bisect
Bug ID: 648894

Test Command: src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --also-run-disabled-tests v8.top_25_smooth
Test Metric: v8_gc_total_percentage_idle/v8_gc_total_percentage_idle
Relative Change: 2.22%
Score: 0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/android_s5_perf_bisect/builds/1015
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9000921735264506512


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=6445780603240448

| 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!

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9000841012233147712

kicked another bisect with a wider range

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


===== SUSPECTED CL(s) =====
Subject : Revert of [heap] Decouple old generation allocation limit from external memory. (patchset #1 id:1 of https://codereview.chromium.org/2329993002/ )
Author  : ulan
Commit description:
  
Reason for revert:
Regressions in telemetry benchmarks:
 crbug.com/646819 .

Original issue's description:
> [heap] Decouple old generation allocation limit from external memory.
>
> We check for external memory limit in Heap::ReportExternalMemoryPressure.
>
> BUG= chromium:616434 
>
> Committed: https://crrev.com/672d079ccba686019fa1457c83b42c2e692ef88b
> Cr-Commit-Position: refs/heads/master@{#39374}

TBR=hpayer@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG= chromium:616434 

Review-Url: https://codereview.chromium.org/2339033005
Cr-Commit-Position: refs/heads/master@{#39442}
Commit  : eeb4f28aed721c343d43be6e454fafba4c0f7ea6
Date    : Thu Sep 15 10:14:22 2016


===== TESTED REVISIONS =====
Revision                       Mean     Std Dev   N   Good?
chromium@418836                13.7457  1.44838   8   good
chromium@418864                13.5808  1.67266   8   good
chromium@418878                13.744   1.19804   8   good
chromium@418885                13.72    1.83318   8   good
chromium@418888                13.9645  1.45195   8   good
chromium@418890                15.0446  1.45925   5   good
chromium@418890,v8@f84f45f9ca  13.9662  2.24996   12  good
chromium@418890,v8@eeb4f28aed  11.3437  1.62034   12  bad    <--
chromium@418890,v8@b37daacd6b  11.0335  1.35639   12  bad
chromium@418890,v8@b848716c98  11.7533  0.766909  5   bad
chromium@418891                10.6868  1.23178   8   bad
chromium@418945                11.08    1.05221   5   bad

Bisect job ran on: android_s5_perf_bisect
Bug ID: 648894

Test Command: src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --also-run-disabled-tests v8.top_25_smooth
Test Metric: v8_gc_total_percentage_idle/v8_gc_total_percentage_idle
Relative Change: 21.22%
Score: 99.8

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/android_s5_perf_bisect/builds/1020
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9000841012233147712


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5242743108927488

| 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!