Visit Jeremy's Blog.
Go Back > Forums > Linux Forums > Linux - General
User Name
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.


  Search this Thread
Old 11-16-2003, 06:02 AM   #1
Registered: Nov 2002
Distribution: Debian testing.
Posts: 143

Rep: Reputation: 15
Post High interrupts


when typing 'vmstat' on my Linux NAT router/firewall box, even when the box is idling (running a cut down custom kernel with hardly anly services running), the 'int' (interrupts) section always shows > 100.

On any other box i run vmstat on, this is < 100, at least for the first time i run it.

Is there anything to be worried about here? Why is the box constantly at > 100 interrupts ? ...
I don't know what could be causing them...

Any ideas?

Old 12-29-2003, 05:56 PM   #2
Registered: Jun 2003
Location: Tampa, Fl
Distribution: Gentoo, Slackware
Posts: 828

Rep: Reputation: 39
It may be a problem with apic
Old 12-29-2003, 06:23 PM   #3
Registered: Dec 2003
Location: Long Island, NY USA
Distribution: RedHat, SUSE
Posts: 336

Rep: Reputation: 30
Even though nothing is running you are receiving packets while running vmstat. Each packet cause a least one interupt. A contect switch causes an interupt and many other things cause interupts. I would not be concerned about 100 interupts/sec. Are you experiencing any performance problems or are you just currious?
Old 12-29-2003, 07:56 PM   #4
Registered: Feb 2003
Location: Wichita, KS
Distribution: Heavily modified Redhat
Posts: 194

Rep: Reputation: 30
Is there a timer interrupt?
Old 12-29-2003, 08:04 PM   #5
Registered: Dec 2003
Location: Long Island, NY USA
Distribution: RedHat, SUSE
Posts: 336

Rep: Reputation: 30
Yay its not context switching that generates an interrupt, but a rather the timer interupt causes the context switch. My bad. Spreading misinfomation again. Sorry


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
Interrupts rhcohen Programming 5 12-21-2017 11:25 AM
BIOS Interrupts Orkie Programming 3 04-22-2005 09:23 AM
interrupts registrering sdimag Programming 0 11-02-2004 03:40 AM
about interrupts eshwar_ind Programming 1 02-25-2004 12:38 AM
Lost interrupts ardvark Linux - Hardware 9 08-08-2003 12:04 AM > Forums > Linux Forums > Linux - General

All times are GMT -5. The time now is 08:23 AM.

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