1099497 - [e10s] Firefox rarely may hang when opening link in new tab with high CPU at NtWaitForMultipleObjects

Status: RESOLVED WORKSFORME

(Firefox :: Untriaged, defect)

Description

[Ray Satiro]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:36.0) Gecko/20100101 Firefox/36.0
Build ID: 20141114030206

Steps to reproduce:

No known way to reproduce.


Actual results:

I have just started using the e10s nightlies. Sometimes I will middle-click on a tab and as that tab is opening Firefox will freeze and the GUI will turn white and become unresponsive. On a whim one time I tried killing plugin-container.exe and immediately when I did that the browser started responding again. Since then I have been able to unfreeze the browser that way.

However whenever I unfreeze there is a message in each open tab stating Tab crashed 'Try again'. For each tab if I click on that button it either will work or do nothing. What always works in every tab is clicking on reload.


Expected results:

.

Comment 1

[Loic]

You can follow this comment to provide more info about your issue, it could help to debug.
https://bugzilla.mozilla.org/show_bug.cgi?id=1065463#c1

Comment 2

[Loic]

In addition, do you see the same issue with e10s disabled?

Comment 3

[Tim Taubert [:ttaubert] (inactive)]

I had the same thing happening to me probably 2-3 times in the last week. It occurred mostly after I opened maybe two new tabs and tried to close one of them while they're still loading.

Comment 4

[Ray Satiro]

(In reply to Loic from comment #1)
> You can follow this comment to provide more info about your issue, it could
> help to debug.
> https://bugzilla.mozilla.org/show_bug.cgi?id=1065463#c1

To make sure we are on the same page here you wanted me to install the profiler extension?
https://developer.mozilla.org/en-US/docs/Mozilla/Performance/Reporting_a_Performance_Problem
I installed it. Are there any settings I should change? Am I supposed to let it run for several days? Also, if I click stop instead of analyze where is the profile file stored? I can't find it.

(In reply to Loic from comment #2)
> In addition, do you see the same issue with e10s disabled?

It's unlikely I'll encounter this issue with e10s disabled because the issue is rare and there's no way to reproduce that I know of and I have e10s enabled by default.

Comment 5

[Ray Satiro]

Attachment: profile analyze button clicked after restart due to freeze

I can't keep running this profiler firefox keeps freezing for no reason. I have two profiles I clicked analyze on and they are both NtWaitForMultipleObjects waiting. I uploaded the one from just now. It is a separate issue, I guess.

Comment 6

[Mike Conley (:mconley) (:⚙️)]

Here's a link to open the profile: http://people.mozilla.org/~bgirard/cleopatra/?customProfile=http://people.mozilla.org/~mconley2/profiles/b1IM7loo

Comment 7

[Wayne Mery (:wsmwk)]

Ray, does it still happen with newer nightly?

Comment 8

[Ray Satiro]

(In reply to Wayne Mery (:wsmwk) from comment #7)
> Ray, does it still happen with newer nightly?

No Wayne it hasn't happened in at least several weeks. I've been using Nightly e10s daily since I posted and I update it manually every week or so. My other GUI freeze issues are gone as well. I don't know why. Nothing on my system has changed aside from Nightly updates and Windows updates. There is one thing I've been doing differently for a while now which is I rarely ever allow flash when I visit webpages. I don't know if that's related.

Comment 9

[Jim Mathies [:jimm]]

Please reopen if you run into this again.