1760382 - Intermittent freezes when compiling Firefox

Status: RESOLVED WORKSFORME

(Core :: Widget: Cocoa, defect, P3)

Description

[Markus Stange [:mstange]]

Steps to reproduce:

1. Compile Firefox on an Apple Silicon Mac.
2. During compilation, switch to a running instance of Firefox and interact with it.

Expected results:
Firefox should always be somewhat responsive, even with a build running in the background.

Actual results:
Sometimes Firefox is frozen for multiple seconds.

I saw this on my M1 Max which is running macOS 12.2.1. Nazim reported the same issue a few days ago.
I don't remember this happening in the past.

Comment 1

[Markus Stange [:mstange]]

Attachment: Activity Monitor sample

Comment 2

[Timothy Nikkel (:tnikkel)]

The symptoms sound like my normal experience for quite a while with Firefox on my 2019 macbook pro with known thermal issues.

Comment 3

[Jeff Muizelaar [:jrmuizel]]

Timothy, do you also time being spent in _OSSpinLockLockYield in activity monitor when it happens to you?

Comment 4

[Brad Werth [:bradwerth]]

(In reply to Timothy Nikkel (:tnikkel) from comment #2)

The symptoms sound like my normal experience for quite a while with Firefox on my 2019 macbook pro with known thermal issues.

In my experience, my M1 Max is cool all the time. Whatever this is, I don't think this is thermal throttling. I'll try to reproduce as well.

Comment 5

[Timothy Nikkel (:tnikkel)]

Attachment: Sample of Firefox.txt

Not sure if this is useful or not, didn't seem to resolve symbols in Firefox, maybe because I'm running beta and not nightly?

Comment 6

[Jeff Muizelaar [:jrmuizel]]

There's only one thread that seems stuck in _OSSpinLockLockYield so it's hard to say if it's the same thing.

Comment 7

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:spohl, could you have a look please?

For more information, please visit auto_nag documentation.

Comment 8

[Stephen A Pohl [:spohl]]

I'm able to reproduce this as well.

Comment 9

[Florian Quèze [:florian]]

I captured a profile of it: https://share.firefox.dev/3KdUoMT Only the parent process seems frozen (not capturing any sample). I unfroze it to capture the profile with a ctrl-z on the terminal where I was building.

Comment 10

[Brad Werth [:bradwerth]]

I just experienced this today and used a "kill -SIGABRT" on Firefox to crash it, generating a crash report which I tagged with this Bug number. Hopefully it will get connected.

Comment 11

[Brad Werth [:bradwerth]]

Bug report is https://crash-stats.mozilla.org/report/index/c010d5b7-5b93-4e8d-9d78-81a6f0220426. Possibly related to Bug 1670885.

Comment 12

[BugBot [:suhaib / :marco/ :calixte]]

Closing because no crashes reported for 12 weeks.

Comment 13

[Timothy Nikkel (:tnikkel)]

We'd only hit that signature if a dev abort their process during a hang.

Comment 14

[BugBot [:suhaib / :marco/ :calixte]]

Closing because no crashes reported for 12 weeks.