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Issue 830507 link

Starred by 2 users
Status: WontFix
Owner:
leszeks@chromium.org
Closed: Apr 2018
Cc:
mlippautz@chromium.org
yangguo@chromium.org
leszeks@chromium.org
jgruber@chromium.org
cbruni@chromium.org
█ hpayer@chromium.org
ahaas@chromium.org
neis@chromium.org
v8-autoroll@chromium.org
ishell@chromium.org
mstarzinger@chromium.org
clemensh@chromium.org
u...@chromium.org
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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5.7%-316% regression in system_health.memory_desktop at 548944:549053

Project Member Reported by hpayer@google.com, Apr 9 2018 
See the link to graphs below.
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Apr 9 2018 

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=830507

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=524f1f5bc79fa628e09d10d3d27ae5d658c9f5b29cc5134c63d752f5937cd819


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

android-nexus5
android-nexus7v2
android-one
chromium-rel-mac11-air
chromium-rel-mac11-pro
chromium-rel-mac12
chromium-rel-win7-dual
linux-release
Project Member

Comment 6 by 42576172...@developer.gserviceaccount.com, Apr 11 2018

Cc: ishell@chromium.org neis@chromium.org yangguo@chromium.org mstarzinger@chromium.org cbruni@chromium.org leszeks@chromium.org
Owner: leszeks@chromium.org
📍 Found a significant difference after 1 commit.
https://pinpoint-dot-chromeperf.appspot.com/job/14a777acc40000

[objects] Merge SFI outer_scope_info and feedback_metadata by leszeks@chromium.org
https://chromium.googlesource.com/v8/v8/+/6bd1d3c28015b31d33f082e019c8d3cccc22be0a

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

Comment 7 by leszeks@chromium.org, Apr 11 2018 

This should have been an unconditional improvement :/

Could it be a GC pressure thing? That's basically my excuse for any hard-to-understand regressions.

Comment 8 by hpayer@chromium.org, Apr 11 2018 

The system health regression is also surprising - because this one is measuring live memory. I guess you need to reproduce.

Comment 9 by leszeks@chromium.org, Apr 19 2018

Status: WontFix (was: Assigned)
Yeah, looks like bad luck with GC timings, I see fewer GCs in general in the trace after. To be expected with an object size decrease I think.

Comment 10 by leszeks@chromium.org, May 1 2018

Cc: clemensh@chromium.org u...@chromium.org ahaas@chromium.org mlippautz@chromium.org v8-autoroll@chromium.org jgruber@chromium.org
 Issue 827994  has been merged into this issue.
►

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