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Old 11-16-2003, 06:02 AM   #1
dunkyb
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Registered: Nov 2002
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Post High interrupts


Hi,

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?

Cheers
 
Old 12-29-2003, 05:56 PM   #2
Joey.Dale
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It may be a problem with apic
 
Old 12-29-2003, 06:23 PM   #3
g-rod
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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
jspenguin
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Is there a timer interrupt?
 
Old 12-29-2003, 08:04 PM   #5
g-rod
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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
 
  


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