LinuxQuestions.org
Help answer threads with 0 replies.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Software
User Name
Password
Linux - Software This forum is for Software issues.
Having a problem installing a new program? Want to know which application is best for the job? Post your question in this forum.

Notices



Reply
 
Search this Thread
Old 05-08-2011, 07:42 AM   #1
Chris M.
LQ Newbie
 
Registered: May 2011
Location: Bavaria
Distribution: Kubuntu
Posts: 2

Rep: Reputation: 0
Question High load with low CPU, I/O, Mem


Hi,

I've got a Dell Vostro 3700 laptop that I run Kubuntu 64 bit on. The versions used were 10.10 and now 11.04.

Since the beginning that system has the "problem" that it's allways showing a load of slightly above 1.0 although it's not used, no processes are using the CPU, memory is free and no I/O is beeing done.

Top might look like
Code:
top - 14:10:35 up  1:36,  2 users,  load average: 1.06, 1.07, 1.05
Tasks: 161 total,   2 running, 159 sleeping,   0 stopped,   0 zombie
Cpu0  :  0.3%us,  0.3%sy,  0.0%ni, 99.3%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu1  :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu2  :  2.7%us,  0.7%sy,  0.0%ni, 96.7%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu3  :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:   3853268k total,  1856056k used,  1997212k free,    87916k buffers
Swap: 11287548k total,        0k used, 11287548k free,   815152k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                            
 1753 schnecke  20   0  919m 295m  37m S    3  7.8   4:56.63 firefox-bin                        
 1579 schnecke  20   0  731m  39m  25m S    2  1.1   1:39.94 knotify4                           
  930 root      20   0  211m  38m  15m S    0  1.0   1:16.39 Xorg                               
 3114 schnecke  20   0 19352 1348  964 R    0  0.0   0:02.79 top                                
 3347 root      20   0     0    0    0 S    0  0.0   0:00.01 kworker/u:0                        
    1 root      20   0 24148 2268 1360 S    0  0.1   0:01.40 init                               
    2 root      20   0     0    0    0 S    0  0.0   0:00.00 kthreadd                           
    3 root      20   0     0    0    0 S    0  0.0   0:00.14 ksoftirqd/0                        
    6 root      RT   0     0    0    0 S    0  0.0   0:00.00 migration/0                        
    7 root      RT   0     0    0    0 S    0  0.0   0:00.00 migration/1                        
    9 root      20   0     0    0    0 S    0  0.0   0:00.03 ksoftirqd/1                        
   11 root      RT   0     0    0    0 S    0  0.0   0:00.00 migration/2                        
   13 root      20   0     0    0    0 S    0  0.0   0:00.09 ksoftirqd/2                        
   14 root      RT   0     0    0    0 S    0  0.0   0:00.00 migration/3                        
   16 root      20   0     0    0    0 S    0  0.0   0:00.26 ksoftirqd/3                        
[...]
How can I figure out what's holding the load high?

The real problem with that system is, that the systems sometimes feels quite slow - and very often the fan goes crazy (constantly speeding up and down)

That behaviour was under 10.10 exactly the same!

If it matters: this system has a Core i5 (i.e. integrated graphics) and an nVidia chip. To be able to use it, I blacklisted the nvidia drivers and am running on the Intel chip alone.
 
Old 05-08-2011, 09:04 AM   #2
Mr. Bill
Member
 
Registered: Mar 2011
Location: Maryland, USA
Distribution: Xubuntu 14.04 - 64
Posts: 182

Rep: Reputation: 14
First, the CPU will never be completely idle, as it is constantly testing input devices for input. Secondly, Ubuntu, KDE and Firefox are resource hogs compared to other distros, DMs and browsers-- testing the status of 159 "sleeping" tasks doesn't help.

Code:
  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                            
 1753 schnecke  20   0  919m 295m  37m S    3  7.8   4:56.63 firefox-bin                        
 1579 schnecke  20   0  731m  39m  25m S    2  1.1   1:39.94 knotify4
In the code you provided you have firefox with 3% CPU use and knotify with 2%, even though they are "idle". That's a perfect example.
 
Old 05-08-2011, 12:00 PM   #3
jefro
Guru
 
Registered: Mar 2008
Posts: 12,087

Rep: Reputation: 1521Reputation: 1521Reputation: 1521Reputation: 1521Reputation: 1521Reputation: 1521Reputation: 1521Reputation: 1521Reputation: 1521Reputation: 1521Reputation: 1521
I don't see anything wrong.
 
Old 05-08-2011, 12:18 PM   #4
Chris M.
LQ Newbie
 
Registered: May 2011
Location: Bavaria
Distribution: Kubuntu
Posts: 2

Original Poster
Rep: Reputation: 0
I also see nothing wrong - except that the averare load (1, 5 and even over 15 minutes!) is around 1 when the box is idle...

It's clear that programms like firefox are constantly draining a bit of CPU, but that doesn't matter. Load defines the average number of processes running or waiting to be executed. So if all the CPUs are all the time 95% to 100% idle, I can't imagine that there's all the time a process to be processed.
 
Old 05-08-2011, 04:16 PM   #5
Mr. Bill
Member
 
Registered: Mar 2011
Location: Maryland, USA
Distribution: Xubuntu 14.04 - 64
Posts: 182

Rep: Reputation: 14
Quote:
Originally Posted by jefro View Post
I don't see anything wrong.
I didn't either, especially considering the hoggish software on his system. i was merely pointing out what was happening to help answer his question.

Quote:
Originally Posted by Chris M. View Post
I also see nothing wrong - except that the averare load (1, 5 and even over 15 minutes!) is around 1 when the box is idle...

It's clear that programms like firefox are constantly draining a bit of CPU, but that doesn't matter. Load defines the average number of processes running or waiting to be executed. So if all the CPUs are all the time 95% to 100% idle, I can't imagine that there's all the time a process to be processed.
That's a bit hypocritical isn't it, considering you're the one with the problem?

Quote:
Originally Posted by Chris M. View Post
Since the beginning that system has the "problem" that it's allways showing a load of slightly above 1.0 although it's not used, no processes are using the CPU, memory is free and no I/O is beeing done.

How can I figure out what's holding the load high?
Obviously, Firefox and Knotify ARE doing SOMETHING, whether or not you think they should be, hence my first response that quoted the CPU usage by both.
 
  


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 Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
High Load Average, Low CPU, Low IO Wait ordaolmayanadam Linux - Server 13 07-15-2010 07:55 AM
High load average, low cpu usage on CentOS 5.4 64-bit lancherider Linux - Server 4 06-01-2010 05:08 PM
high load average, low cpu usage ! jimmyjiang Red Hat 8 02-08-2008 01:28 AM
CPU load high, top processes very low? Thinking Linux - Software 12 03-19-2007 01:59 AM
High Load, Low CPU/RAM/iowait ? newlinuxnewbie Linux - Server 1 09-22-2006 10:24 AM


All times are GMT -5. The time now is 07:21 AM.

Main Menu
Advertisement
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