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-   -   What is Interrupt 0? (https://www.linuxquestions.org/questions/linux-newbie-8/what-is-interrupt-0-a-4175426371/)

bluefeet 09-09-2012 09:44 AM
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.

pixellany 09-09-2012 10:43 AM
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

bluefeet 09-09-2012 10:49 AM
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

273 09-09-2012 11:06 AM
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

nigelc 09-09-2012 11:46 PM
Interrupt 0 is the highest priority interrupt i.e the timer.


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