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Issue 650384 link

Starred by 1 user

Issue metadata

Status: Duplicate
Merged: issue 40407
Owner:
Closed: Mar 2017
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Windows
Pri: 2
Type: Bug-Regression



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High CPU usage attributed to "browser"

Reported by dan...@d15.biz, Sep 26 2016

Issue description

UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.79 Safari/537.36 Edge/14.14393

Steps to reproduce the problem:
Chrome is using a lot of CPU power, and its Task Manager attributes this to "Browser". Is there a way I can debug why this is happening?

What is the expected behavior?
Chrome does not turn my laptop into a heater

What went wrong?
Laptop is burning my lap

Did this work before? Yes This only broke within the last few weeks - Maybe with Chrome 53 stable or 54 beta

Chrome version: 54.0.2840.34  Channel: beta
OS Version: 10.0
Flash Version: Shockwave Flash 23.0 r0
 
browser.PNG
28.2 KB View Download

Comment 1 by dan...@d15.biz, Sep 26 2016

Confirmed that this still happens even after disabling all extensions.

Comment 2 by dan...@d15.biz, Sep 26 2016

Seems like this was at least partially caused by the "JumpListIcons" directory containing exactly 65535 files. I looked at the Chrome process with Sysinternals Process Monitor and found it continuously reading from/writing to that directory.  I just deleted the entire directory and the CPU usage dropped. Now it's still using 7% while idle, but much lower than before.
JumpListIcons.PNG
32.2 KB View Download
Labels: Stability-Memory
Labels: Needs-Bisect
Cc: kulshin@chromium.org krajshree@chromium.org
Components: UI>OSIntegration
Labels: Needs-Feedback
Need help in reproducing this issue as i don't have "JumpListIcons" directory containing 65535 files.

kulshin@ - Could you please provide more inputs on this issue for further investigation.

Thanks,

Comment 6 by dan...@d15.biz, Oct 19 2016

I guess some of the fixes here might help: https://bugs.chromium.org/p/chromium/issues/detail?id=40407#c82
Labels: TE-NeedsTriageHelp
@kulshin - Gentle ping. Could you please look into this issue.

Adding label TE-NeedsTriageHelp
Project Member

Comment 8 by sheriffbot@chromium.org, Oct 28 2016

Labels: -Needs-Feedback Needs-Review
Owner: krajshree@chromium.org
Thank you for providing more feedback. Adding requester "krajshree@chromium.org" for another review and adding "Needs-Review" label for tracking.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
Labels: -Needs-Review -Needs-Bisect
Owner: ----
Components: -UI>OSIntegration Internals>PlatformIntegration
Deprecating UI>OSIntegration in favor of the more generic Internals>PlatformIntegration

Comment 11 by grt@chromium.org, Feb 21 2017

Labels: Needs-Feedback
The very act of having Chrome's Task Manager open causes the browser process's CPU usage to rise since the browser process must use CPU to measure the system and update the Task Manager UI. You could try using a program like Process Explorer or Process Hacker to look at the CPU usage of the browser process without Chrome's Task Manager open (the browser proc is the chrome.exe process that is the parent to all others). Let us know if this still seems high given what you see on your machine.

Regarding the JumpList icons, fixes have been landing in that corner of the code recently, so other users affected by that particular issue should be rescued soon.
Cc: chengx@chromium.org
Cc: -chengx@chromium.org brucedaw...@chromium.org
Mergedinto: 40407
Owner: chengx@chromium.org
Status: Duplicate (was: Unconfirmed)

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