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Issue 816492 link

Starred by 1 user

Issue metadata

Status: WontFix
Owner:
Closed: Feb 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression

Blocking:
issue 816541



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1.1%-13.9% regression in octane at 538467:538661

Project Member Reported by tdres...@chromium.org, Feb 26 2018

Issue description

See the link to graphs below.
 
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Feb 26 2018

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=816492

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=bd91d740795af6ea9af2dd92485767544a3cadb82b5e12dbe731768532ebe015


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

android-nexus5
android-nexus5X
android-one
android-webview-nexus5X
chromium-rel-mac11-pro
Project Member

Comment 2 by 42576172...@developer.gserviceaccount.com, Feb 26 2018

๐Ÿ“ Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/14ea7598440000

Comment 3 by gab@chromium.org, Feb 26 2018

Components: Blink>JavaScript>GC
Owner: gab@chromium.org
Status: Assigned (was: Untriaged)
Stumbled on this in graphs : pretty sure this is https://chromium.googlesource.com/v8/v8/+/3c62f7ae0744ebf95769429e5b2b3c83fc384fdf given it also lines up with its revert.

Comment 4 by gab@chromium.org, Feb 27 2018

Cc: sullivan@chromium.org simonhatch@chromium.org
sullivan,simonhatch: pinpoint is still running after 17 hours, seems pretty clear to me from the graphs, why is it taking so long?

Comment 5 by gab@chromium.org, Feb 27 2018

Blocking: 816541
Cc: dtu@chromium.org
dtu, simonhatch, can one of you take a look?
I think the android-one bots are just overloaded at the moment, there are only 3 devices: https://chromium-swarm.appspot.com/botlist?c=id&c=os&c=task&c=status&f=pool%3AChrome-perf-pinpoint&f=device_type%3AAndroid%20One%20(sprout)&l=100&s=id%3Aasc

All of which are running tasks, and looking at a couple there seemed to be about 40 more test runs queued each.

Comment 8 by dtu@chromium.org, Feb 27 2018

From the Pinpoint results so far, it looks like one of these 3:
7507763 cros: Workaround crash in Feedback tool under --mash by James Cook ยท 5 days ago
fecb9c3ee Handle errors properly in node.py. by Torne (Richard Coles) ยท 5 days ago
68d73438 Add MemoryAblation to field_trial_config by Maria Khomenko ยท 5 days ago

(Yes, they're way overloaded.)

Comment 9 by gab@chromium.org, Feb 28 2018

Status: WontFix (was: Assigned)
mariakhomenko@'s blamed CL was already reverted and I'm tracking mine elsewhere.

It's unfortunate that pinpoint jobs can't be preempted when a blame CL was identified, doing so would help relieve the bots (especially in scenarios like this where a single CL regresses *many* benchmarks which result in *many* pinpoint jobs).
That's an interesting idea, maybe we could put in something manual to go shut off other jobs? Dave, wdyt?

Comment 11 by dtu@chromium.org, Feb 28 2018

Yes, we can include a manual "Stop" button. I don't think we could do it automatically, since if the job is still running we don't yet know what the culprits are.

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