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Most tabs randomly start to consume a lot of CPU for no reason
Reported by
teo8...@gmail.com,
Jun 15 2016
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Issue descriptionUserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.84 Safari/537.36 Steps to reproduce the problem: 1. Open some tabs 2. browse the Internet What is the expected behavior? What went wrong? Chrome has suddenly started to consume insane amounts of CPU for no apparent reasons. This happened with random pages that don't run any heavy script or play media content, and even in empty tabs. All of the following happened in a single session: - I opened a new tab and I was going to type "newrelic", I started by typing "new". As I got to the "w" the browser froze for a few seconds and the "w" I had typed didn't show up until a few second later. Then it eventually showed up but everything was very unresponsive. So I opened the Task Manager, and to my surprise, there was a process called "Prerender: Netflix" that was consuming more than 60% of CPU. I had no tab open with netflix and the word netflix was not even showing up in my omnibox where I had already typed "new" and the proposed results were already visible. I assume there had been a short instant when I had typed "ne" and before I typed the "w" (that must have been a tiny fraction of a second) when Chrome "thought" I was going to type "netflix", but that moment was already gone, and almost a minute later, there was still this "Prerender: Netflix" process consuming CPU - At some point a fresh new tab where I hadn't yet loaded any page not typed anything in the omnibox was consuming more than 70% CPU - At some point this page: https://newrelic.com/ (yes, the very home page) that I managed to open in a tab, was consuming nearly 100% CPU (as reported by the Task Manager) Chrome was unusably slow and was rendering the whole system unusable, because the heating triggered the "software cooler" (I don't know how it's called) which injects idle processes taking CPU time to do nothing to prevent excessive heating. By closing Chrome, the system went back to stable. NOTE: I had only about half a dozen tabs open and none of these was playing video nor doing anything "heavy". And this is not the first time recently that I observe abnormal CPU consumption in Chrome on random pages, most of which are not doing much "work", if any at all. I'm starting to wonder if #617452 is just a manifestation of this issue and isn't really related to video. Did this work before? Yes few weeks ago, I think. Chrome version: 51.0.2704.84 Channel: stable OS Version: Flash Version: Shockwave Flash 21.0 r0
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Jun 16 2016
> and check which process is showing such spike in CPU memory As I alreadty said, this varies: sometimes it's a given tab (which usually has no reason for being consuming much CPU), sometimes it's another, sometimes more than one, and in one occasion it was a process called "Prerender: Netflix" (while I hadn't open Netflix in any tab at all). I'll attach a screenshot next time it happens. > Check the same in incognito or disable all the extensions in the existing profile and see if this makes any difference. I doubt there's any point in doing this given that: 1. extensions are listed in the task manager and in no case, ever, was any extension consuming a significant amount of CPU 2. I only have 2 extension (namely "User Agent Switcher" and "QR-code Tag Extension" and I have had them for ages much before I started observing the issue; also, these extension do nothing most of the time.
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Jun 16 2016
Thank you for providing more feedback. Adding requester "ajha@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
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Jun 17 2016
Will have to check the processes running in the task manager when this happens.
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Jun 17 2016
> Will have to check the processes running in the task manager when this happens. The processes were: - "Browser" - "GPU process" - one process per tab - one process per plugin and extension - sometimes a "Prerender: something" process Which ones were consuming a lot of CPU are detailed in comment 2
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Jun 17 2016
Thank you for providing more feedback. Adding requester "ajha@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
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Jul 1 2016
If this is still an issue and consistent, please let us know the Linux system details and screenshots of the task manager when such memory spike is seen. Works fine for me on Linux Ubuntu 14.04, chrome version: 51.0.2704.106.
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Jul 1 2016
If you can reproduce this, could you create a trace file as per the instructions at https://www.chromium.org/developers/how-tos/submitting-a-performance-bug and attach it here? Thanks!
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Aug 3 2016
teo8976@ : Could you please update the thread according to above comment # 8.
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Aug 21 2016
Probably not. This happens randomly, not particularly often, and when it does I usually don't have much time to waste creating a trace file.
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Aug 25 2016
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Sep 1 2016
Thank you for providing more feedback. Adding requester "ajha@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
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Sep 20 2016
Trace file would help in further investigation if this issue is still seen on the latest stable(53.0.2785.116).
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Sep 20 2017
Issue has not been modified or commented on in the last 365 days, please re-open or file a new bug if this is still an issue. For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot |
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Comment 1 by ajha@chromium.org
, Jun 16 2016Labels: Needs-Feedback Stability-Memory