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Issue 794992 link

Starred by 1 user
Status: Duplicate
Merged: issue 795004
Owner:
mstarzinger@chromium.org
Closed: Aug 17
Cc:
mlippautz@chromium.org
hablich@chromium.org
█ kraynov@chromium.org
mstarzinger@chromium.org
u...@chromium.org
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression

Blocking:
issue v8:6792



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1.1%-1.9% regression in jetstream at 522212:522379

Project Member Reported by kraynov@chromium.org, Dec 14 2017 
See the link to graphs below.
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Dec 14 2017 

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=794992

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=f94aeea486cf4aead62d244f202ce20777ac0ab47425080db7699db608509ff4


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

chromium-rel-mac-retina
chromium-rel-win7-gpu-intel
chromium-rel-win7-gpu-nvidia
linux-release
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Dec 15 2017

Cc: mlippautz@chromium.org u...@chromium.org mstarzinger@chromium.org hablich@chromium.org
Owner: u...@chromium.org
Status: Assigned (was: Untriaged)
📍 Found significant differences after each of 2 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/13a95132040000

Enable --write-protect-code-memory by default.
By mstarzinger@chromium.org · Wed Dec 06 10:14:58 2017
v8 @ 02d201bfdd18f1292146dd32bcca911c3465a991

[heap] Add tracing scope for concurrent marking.
By ulan@chromium.org · Wed Dec 06 10:33:48 2017
v8 @ fc5b2ff106d95b13e9575332692d0927f04b6fef

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

Comment 4 by u...@chromium.org, Dec 15 2017 

Regression from my CL is unexpected. It adds tiny overhead to concurrent marker.

mstarzinger@, could it be related to SunSpider regression from W^X?

Comment 5 by u...@chromium.org, Dec 15 2017

Owner: mstarzinger@chromium.org
Assigning to Michael after offline discussion.

Comment 6 by mstarzinger@chromium.org, Dec 15 2017

Blocking: v8:6792

Comment 7 by sullivan@chromium.org, Jan 23 2018 

Michael: perf sheriff checking in, any progress on this bug?

Comment 8 by tdres...@chromium.org, Aug 17

Mergedinto: 795004
Status: Duplicate (was: Assigned)
►

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