LinuxQuestions.org
Support LQ: Use code LQ3 and save $3 on Domain Registration
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 05-21-2009, 04:50 PM   #1
Vikneels
LQ Newbie
 
Registered: May 2009
Posts: 4

Rep: Reputation: 0
top linux command reporting wrong values


Hi,

I was running some test and i happened to find that even though the cpus are handling the intterupts and the number of interrupts on each cpu is 1000/sec, the top command shows all the cpus are idle. What will be the reason for this?

Also, in NFS time out happens sometime in my machine. Will that be a reason for wrong cpu utilization number.

thanks,
Vikram
 
Old 05-21-2009, 07:47 PM   #2
syg00
LQ Veteran
 
Registered: Aug 2003
Location: Australia
Distribution: Lots ...
Posts: 12,491

Rep: Reputation: 1077Reputation: 1077Reputation: 1077Reputation: 1077Reputation: 1077Reputation: 1077Reputation: 1077Reputation: 1077
Top merely reports what is accumulated in /proc.
If a CPU is in interrupt context, it is not going to be sampled. Hence the usage is "lost" - as is the time for running the sampling code I suspect, but I haven't checked.

I would think the NFS timeouts are unrelated.
 
  


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
How to convert the values displayed by sar -r with top rajaniyer123 Solaris / OpenSolaris 9 07-05-2010 03:48 PM
memory reporting: top vs. system monitor jhwilliams Fedora 1 08-17-2007 12:42 PM
Top not reporting full ram satinet Linux - Hardware 5 02-05-2006 04:28 PM
Linux Reporting Wrong Processor? PipeDreams Linux - Hardware 2 01-15-2006 09:30 PM
Kernel Reporting Wrong Version JShadow Linux - General 7 03-24-2005 10:34 AM


All times are GMT -5. The time now is 05:59 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