Can someone assist me in analyzing the data in this output from my /proc/interrupts file?

$ cat /proc/interrupts
           CPU0       CPU1
  0:         22          0  IR-IO-APIC   2-edge      timer
  1:          2          0  IR-IO-APIC   1-edge      i8042
  8:          1          0  IR-IO-APIC   8-edge      rtc0
  9:          0          0  IR-IO-APIC   9-fasteoi   acpi
 12:          4          0  IR-IO-APIC  12-edge      i8042
120:          0          0  DMAR-MSI   0-edge      dmar0
122:          0          0  IR-PCI-MSI 327680-edge      xhci_hcd
123:      25164    5760490  IR-PCI-MSI 1048576-edge      enp2s0
124:         17    5424414  IR-PCI-MSI 524288-edge      amdgpu

What I have compiled so far...

  • Column 1: IRQ number
  • Column 2&3: # of interrupts per CPU (variable # of columns depends on how many CPUs your system has)
  • Column 4: Type of interrupt
  • Column 5: ???
  • Column 6: Name of device

I'm interested in finding out what data the 5th column contains, i.e. 524288-edge, and if someone can break down what the number represents. From researching online I only see the interrupt type column followed by the name of the device, this column data is always missing. Is it simply more information about the interrupt type?


I am still poking around this area too.

This points to the "edge" meaning the type of irq is an "edge falling" irq: https://www.raspberrypi.org/forums/viewtopic.php?t=20931

Looking at mine, I have "18 edge" and that ties in with the GPIO-18 I expect the interrupt to come in on in my case :

       CPU0      CPU1   CPU2  CPU3
172:   1387      0      0     0     pinctrl-bcm2835  18 Edge      lirc_rpi

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.