1592271 - High idle CPU use on Linux (Solus) after latest (70.0) update

Status: RESOLVED INCOMPLETE

(Core :: Performance, defect, P3)

Description

[kratti]

Attachment: Firefox 2019-10-29 14.08 profile.json.gz

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0

Steps to reproduce:

Just open Firefox with some tabs open (old session) after a reboot.

Actual results:

CPU loads are at about a constant 15% while idle.

https://perfht.ml/2MWxak0

Expected results:

a browser shouldn't utilize that much CPU while idle? This did not happen before 70.0.

Comment 1

[Will Hawkins]

We are unable to see any significant CPU usage. We do see that there appears to be a large number of mouse input events and that might be related to one of the sites that you have loaded in a tab. Are you willing to let us know the tabs that you have open?

Also, would you be willing to let us know if you can see this behavior with a fresh profile with the same open tabs?

One final bit of information that would help: Another profile with the "Add custom threads by name" field (from the profiler UI) set to a single comma?

That information would really help! Thank you for taking the time to report these issues -- I hope that we can get to the bottom of it!

Will

Comment 2

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

Clear a needinfo that is pending on an inactive user.

Inactive users most likely will not respond; if the missing information is essential and cannot be collected another way, the bug maybe should be closed as INCOMPLETE.

For more information, please visit auto_nag documentation.