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Shows the number of different IRQs received by the kernel. High disk or network traffic can cause a high number of interrupts (with good hardware and drivers this will be less so). Sudden high interrupt activity with no associated higher system activity is not normal.

Field Internal name Type Warn Crit Info
timer i0 derive     Interrupt 0, for device(s): timer
i8042 i1 derive     Interrupt 1, for device(s): i8042
serial i4 derive     Interrupt 4, for device(s): serial
rtc0 i8 derive     Interrupt 8, for device(s): rtc0
acpi i9 derive     Interrupt 9, for device(s): acpi
ioc0 i16 derive     Interrupt 16, for device(s): ioc0
radeon i19 derive     Interrupt 19, for device(s): radeon
uhci_hcd:usb3 i20 derive     Interrupt 20, for device(s): uhci_hcd:usb3
ehci_hcd:usb1, uhci_hcd:usb2, uhci_hcd:usb4 i21 derive     Interrupt 21, for device(s): ehci_hcd:usb1, uhci_hcd:usb2, uhci_hcd:usb4
ata_piix i23 derive     Interrupt 23, for device(s): ata_piix
PCIe PME i40 derive     Interrupt 40, for device(s): PCIe PME
PCIe PME, pciehp i41 derive     Interrupt 41, for device(s): PCIe PME, pciehp
PCIe PME i42 derive     Interrupt 42, for device(s): PCIe PME
PCIe PME i43 derive     Interrupt 43, for device(s): PCIe PME
eth1 i46 derive     Interrupt 46, for device(s): eth1
Non-maskable interrupts iNMI derive     Interrupt NMI, for device(s): Non-maskable interrupts
Local timer interrupts iLOC derive     Interrupt LOC, for device(s): Local timer interrupts
Spurious interrupts iSPU derive     Interrupt SPU, for device(s): Spurious interrupts
Performance monitoring interrupts iPMI derive     Interrupt PMI, for device(s): Performance monitoring interrupts
IRQ work interrupts iIWI derive     Interrupt IWI, for device(s): IRQ work interrupts
APIC ICR read retries iRTR derive     Interrupt RTR, for device(s): APIC ICR read retries
Rescheduling interrupts iRES derive     Interrupt RES, for device(s): Rescheduling interrupts
Function call interrupts iCAL derive     Interrupt CAL, for device(s): Function call interrupts
TLB shootdowns iTLB derive     Interrupt TLB, for device(s): TLB shootdowns
Thermal event interrupts iTRM derive     Interrupt TRM, for device(s): Thermal event interrupts
Threshold APIC interrupts iTHR derive     Interrupt THR, for device(s): Threshold APIC interrupts
Machine check exceptions iMCE derive     Interrupt MCE, for device(s): Machine check exceptions
Machine check polls iMCP derive     Interrupt MCP, for device(s): Machine check polls
Hypervisor callback interrupts iHYP derive     Interrupt HYP, for device(s): Hypervisor callback interrupts
ERR iERR derive      
MIS iMIS derive