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Issue 837938 link

Starred by 3 users
Status: Assigned
Owner:
ccameron@chromium.org
Cc:
vamshi.kommuri@chromium.org
sdy@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Windows , Mac
Pri: 1
Type: Bug



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60fps idle wakeups when a video tag is present

Project Member Reported by sdy@chromium.org, Apr 28 2018 
Chrome Version: 68.0.3410.0
OS: Tested on macOS 10.13.4, Windows 10.0.16299

What steps will reproduce the problem?
(1) Open a crbug with a video, like  issue 837835 .
(2) Check the Chrome task manager.
(3) Use Inspect Element to delete the video from the page.

What is the expected result?
Low to no idle wakeups.

What happens instead?
The GPU process wakes up 60 times a second, and stops if the video element is removed.

Comment 1 by vamshi.kommuri@chromium.org, Apr 30 2018

Cc: vamshi.kommuri@chromium.org
Labels: Needs-Feedback Triaged-ET
Tried checking the issue on reported chrome version 68.0.3410.0 using Mac 10.13.1 with the below mentioned steps.
1. Launched Chrome
2. Navigated to a crbug.com(...which contains a video)
3. Opened Task manager.
4. Inspected the page to delete the video element.
we observed around 60 Fps of memory under CPU usage in reported chrome version. And we have also checked M60(60.0.3112.0), there the CPU usage was comparatively high. Attaching the screen cast of the same.

@Reporter: As we are not very clear about the expected behaviour "Low to no idle wakeups", Could you please help us by elaborating it, so that it helps us to triage the issue further in a better way.

Thanks!
837938.mp4
2.2 MB View Download

Comment 2 by sdy@chromium.org, Apr 30 2018 

Thanks for trying to repro — the key is that you have to wait a moment and *not* move the mouse around, etc. to see the effect. Also, while you can see the change in the CPU column (the GPU process never goes to 0% while a video tag is present), there is also an "idle wakeups" column that you can turn on which I was referring to (sorry for not mentioning that it's off by default). See attached video!
crbug_837938_demo.mp4
3.8 MB View Download

Comment 3 by ellyjo...@chromium.org, Jul 9

Cc: sdy@chromium.org
Owner: ccameron@chromium.org
Status: Assigned (was: Untriaged)
ccameron@, any ideas?
►

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