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Old 09-09-2012, 10:44 AM   #1
bluefeet
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What is Interrupt 0?


Let me first say that this is for homework for a class. I am new to Linux and have tried to figure out this answer but am at a loss as to what to search on.

I have been asked to send the following at the command line:

# cat /proc/interrupts

I have gotten the results that I believe I need but there is a question that asks 'What is interrupt 0?'

I have no idea what this is or even where to look, can someone direct me or explain what it is? My text book does not contain anything about it.
 
Old 09-09-2012, 11:43 AM   #2
pixellany
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Is it possible that they mean simply the first line in the listing?

Here's mine:
Code:
[mherring@herring_desk ~]$ more /proc/interrupts
           CPU0       CPU1       CPU2       CPU3       
  0:         47          0          0          0   IO-APIC-edge      timer
 
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Old 09-09-2012, 11:49 AM   #3
bluefeet
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That is what I was going to put as an answer but I thought maybe I was missing something. As I said the textbook doesn't have anything about interrupts so I was a bit confused. Thanks
 
Old 09-09-2012, 12:06 PM   #4
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Well, look at the output pixellany got and the output you got -- can you see anything in common? What is the interrupt called? Could that be significant?
For completeness mine looks like this:
Code:
CPU0       CPU1       CPU2       CPU3       CPU4       CPU5       CPU6       CPU7       
  0:         48          9          3          7          2          2          9          4   IO-APIC-edge      timer
 
Old 09-10-2012, 12:46 AM   #5
nigelc
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Interrupt 0 is the highest priority interrupt i.e the timer.
 
  


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