1872620 - JIT freezes during startup and then occasionally while using, caused by recurring event

Status: RESOLVED DUPLICATE of bug 1679132

(Thunderbird :: General, defect)

Description

[David Heidelberg [:okias]]

Attachment: crash+random-freezes.txt

Steps to reproduce:

System: Debian 13 (x86_64), latest Thunderbird (for testing, experimental repository)

Regression: worked well before 10x.x series for sure, cannot pinpoint exactly because the issue was happening before only sometimes.

1. Start Thunderbird (two accounts, after issues I setup one to manual fetching)

Actual results:

2. Thunderbird is unresponsive for few seconds (sometimes survives, sometimes Waylands compositors kill it)
3. use is fine
4. freezes again in any random situation (writing message, browsing emails)

I tried safe-mode with same result.

Expected results:

No intermittent freezes.

Comment 1

[David Heidelberg [:okias]]

Versions: 10x.x - 121.0b3

Comment 2

[David Heidelberg [:okias]]

I see similarity with https://forums.opensuse.org/t/thunderbird-115-freezes-totally-upon-opening-for-a-minute-or-two/168164

Comment 3

[Wayne Mery (:wsmwk)]

Other recent linux perf issues https://mzl.la/3RFldzb

A performance profile will be useful https://support.mozilla.org/en-US/kb/profiling-thunderbird-performance.
You might need to Install Thunderbird from https://www.thunderbird.net/ to get the symbols.

Comment 4

[David Heidelberg [:okias]]

First test:

1. Downloaded https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/121.0b3/linux-x86_64/en-US/thunderbird-121.0b3.tar.bz2
2. copied the profile from my default profile into the beta one

I see the delay, but it's like 2 seconds instead of 15 - 30s, but it's visible and there.

Comment 5

[David Heidelberg [:okias]]

The profiling is problematic, even ./thunderbird --devtools won't allow me start profiling in right time to catch the initial freeze.

Comment 6

[Wayne Mery (:wsmwk)]

I failed to mention, profiling on startup can be done with instructions at https://profiler.firefox.com/docs/#/./guide-startup-shutdown

Comment 7

[David Heidelberg [:okias]]

Attachment: Screenshot from 2024-01-03 14-14-37.png

So far I haven't found way to anonymize the profiling data, so most of the time it's around these calls.

8s with binary from Thunderbird, xx s from Debian package.

Comment 8

[Wayne Mery (:wsmwk)]

Thanks for the screen shot of your performance profile. I see calendar, and we do have calendar issues. You will want to check your recurring tasks and appointments, and put reasonable end dates on them.

The other possibility is you use https://mozilla.github.io/mozregression/ to find the regression range.

Comment 9

[Wayne Mery (:wsmwk)]

Please let us know what you find.

Comment 10

[David Heidelberg [:okias]]

After dropping one forever recurring everyday event Thunderbird got better, so I assume it's directly related to the calendar.

Comment 11

[Wayne Mery (:wsmwk)]

Thanks. In that case it will be one of these https://mzl.la/42nyb9T

Comment 12

[David Heidelberg [:okias]]

Yes, feel free to mark it as a duplicate.