Lists the interrupts that are currently in use on the system
/proc/interrupts file is a real-time, dynamic file that provides a snapshot of the interrupts happening in your
system. An interrupt is a signal sent to the kernel indicating that an event
has occurred which needs immediate attention.
Why is /proc/interrupts Important?
Interrupts are crucial for efficient performance of a Linux server. They enable the processor to interact with the
hardware in a non-linear manner, improving overall system efficiency. The
/proc/interrupts file allows you to monitor
these interrupts, helping you diagnose potential issues such as hardware conflicts, bottlenecks
or high load.
/proc/interrupts file reveals a table. Each row corresponds to an interrupt number (IRQ), and each column
represents a CPU in the system. The values in the table represent the number of interrupts that each CPU has processed.
Here is an example of what you might see:
0: 45 30 IO-APIC 2-edge timer
1: 20 50 IO-APIC 1-edge i8042
NMI: 0 0 Non-maskable interrupts
LOC: 300255 300255 Local timer interrupts
In this example, the timer interrupt (IRQ 0) has been processed 45 times by CPU0 and 30 times by CPU1.
Working with /proc/interrupts
You can view the contents of the
/proc/interrupts file using the
For a real-time view, you can use the
watch -n 1 cat /proc/interrupts
This will refresh the interrupt counts every second.
Troubleshooting with /proc/interrupts
/proc/interrupts file can be a valuable tool for troubleshooting. For instance, if you notice a specific IRQ with
an unusually high count, it could indicate a hardware issue that's causing excessive interrupts. Or if a single CPU is
handling a disproportionate number of interrupts, it could suggest a problem with IRQ balancing.
/proc/interrupts file is a powerful tool for understanding the intricate hardware interactions on your Linux
server. It provides valuable insights into the operation of your server and can be an essential part of your