LinuxQuestions.org
Register a domain and help support LQ
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - General
User Name
Password
Linux - General This Linux forum is for general Linux questions and discussion.
If it is Linux Related and doesn't seem to fit in any other forum then this is the place.

Notices

Reply
 
Search this Thread
Old 04-30-2012, 10:28 AM   #1
GraysonPeddie
Member
 
Registered: Jul 2008
Location: Tallahassee, FL 32304
Distribution: Bebian Sid for server, KXStudio 12.04 Beta 1 for desktop
Posts: 33

Rep: Reputation: 1
Debian: kworker/u:7 using up 30% of CPU resources


I'm using Debian Sid with Linux kernel 3.3.0-trunk (3.3.2-experimental) and I've noticed that kworker/u:7 uses up to 30% CPU resources and the last time I've tried 3.3.0-rc6, kworker/u:1 uses up to 20% in one of two CPU cores. I don't know what is causing it, so according to the article with noacpi or acpi=off, since I've set acpi=off in /etc/default/grub, I thought this might solve my problem.

For some reason, I can't SSH into my Debian server, probably because the kernel got hang up? I've just made a mistake as I'm unsure if very new computers need ACPI to function. Do they?

I mean, what is causing kworker/u:7 or kworker/u:1 to use up a lot of CPU resources? Linux 3.3.0-trunk did work when kworker is not using any CPU resources, but after a few minutes after reboot (maybe around 10 to 20 minutes? I don't know), it does.
 
Old 04-30-2012, 12:24 PM   #2
craigevil
Senior Member
 
Registered: Apr 2005
Location: OZ
Distribution: Debian Sid
Posts: 4,733
Blog Entries: 12

Rep: Reputation: 456Reputation: 456Reputation: 456Reputation: 456Reputation: 456
usually when kworker is running that high root is doing something.

like cron, logrotate, updatedb, or one of the security apps like tiger, clamav, etc is doing something. On my laptop when I first boot I usually have to wait about 5 minutes to get anything done for those reasons. If you look in top or ps aux you will most likely see a power intensive service running. If its not a root/cron function then it is one of the evil triplets;
nepomuk/strigi, akonadi, desktop effects; I disable them all,

I would re-enable ACPI no reason for it to be disabled.
 
Old 04-30-2012, 12:59 PM   #3
GraysonPeddie
Member
 
Registered: Jul 2008
Location: Tallahassee, FL 32304
Distribution: Bebian Sid for server, KXStudio 12.04 Beta 1 for desktop
Posts: 33

Original Poster
Rep: Reputation: 1
Okay. I'll have to head over to Tallahassee (planning to go to Disney World this Thursday) as I'm in Altha (mom's house) and I don't have access to my server in my apartment.

Thanks for your help.
 
Old 12-12-2012, 03:04 PM   #4
a-raccoon
LQ Newbie
 
Registered: Dec 2012
Posts: 1

Rep: Reputation: Disabled
I just got a notification on my phone warning me that kworker/u:7 is using greater than 50% CPU resources.

This is a Samsung Galaxy S3 running Android 4.0.4 Ice Cream Sandwich (ICS). I got the alert from the Watchdog Lite app which monitors apps for excessive resource consumption.

This is the first time I've gotten this alert, and am curious to know why a "high root linux" thing would be consuming so much CPU all of the sudden.

A drop of paranoia; Has my phone been hijacked by something I installed?
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
[SOLVED] CPU 100% using resources EAI Linux - Newbie 14 07-04-2010 01:25 AM
Apache is consuming all CPU resources romeo_tango Solaris / OpenSolaris 6 01-04-2008 05:43 AM
Inappropriate use of CPU resources Swift&Smart Slackware 4 01-18-2007 02:02 AM
Share CPU resources and memory? corbintechboy General 3 03-17-2006 04:36 AM
XORG using a lot of CPU resources GreatBrak Ubuntu 1 12-02-2005 02:56 PM


All times are GMT -5. The time now is 07:55 AM.

Main Menu
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration