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The central processing unit or "processor" inside a computer which executes the instructions in a computer program.


An interrupt request is a hardware signal sent to the processor that temporarily stops a running program and allows to handle a hardware event.



Cannot sleep run atomically in soft irq context and are guaranteed to never run on more than one cpu of a given processors for a given tasklet

from question  

What is the difference between tasklet and workqueue

In some cases irq constitutes more than 8 of cpu for a process

from question  

Should irq% be included in cpu% of a process?

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