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Issue 874887 link

Starred by 1 user
Status: Duplicate
Merged: issue 874437
Owner:
█ hpayer@chromium.org
Last visit > 30 days ago
Closed: Aug 21
Cc:
jgruber@chromium.org
█ hpayer@chromium.org
tdres...@chromium.org
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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29.5%-58.9% regression in memory.long_running_idle_gmail_tbmv2 at 582986:583046

Project Member Reported by tdres...@chromium.org, Aug 16 
See the link to graphs below.
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Aug 16 

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=874887

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=19a725c41efb4738e1294798a03d5e192b18b3b07b576eb4ccabae462ea03fc5


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

Android Nexus5 Perf
Android Nexus6 WebView Perf
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Aug 17

Cc: hpayer@chromium.org jgruber@chromium.org
Owner: hpayer@chromium.org
Status: Assigned (was: Untriaged)
📍 Found significant differences after each of 2 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/1284ac56640000

[builtins] Declare builtin symbols by jgruber@chromium.org
https://chromium.googlesource.com/v8/v8/+/17ad3ae47f3c7bc390284c62a17b91b133d4323c
17.88 → 15.98 (-1.896)

[heap] Use std::atomic for page flags. by hpayer@chromium.org
https://chromium.googlesource.com/v8/v8/+/7f3f7e8a9547ece1a7f80ce902bc23632e902b0b
15.98 → 23.54 (+7.556)

Understanding performance regressions:
  http://g.co/ChromePerformanceRegressions

Comment 4 by jgruber@chromium.org, Aug 20 

Just clarifying, pinpoint very clearly indicates this as the culprit:

[heap] Use std::atomic for page flags. by hpayer@chromium.org
https://chromium.googlesource.com/v8/v8/+/7f3f7e8a9547ece1a7f80ce902bc23632e902b0b
15.98 → 23.54 (+7.556)

Comment 5 by hpayer@chromium.org, Aug 21

Mergedinto: 874437
Status: Duplicate (was: Assigned)
►

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