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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
2-edge timer	i0	derive			Interrupt 0, for device(s): 2-edge timer
1-edge i8042	i1	derive			Interrupt 1, for device(s): 1-edge i8042
4-edge ttyS0	i4	derive			Interrupt 4, for device(s): 4-edge ttyS0
8-edge rtc0	i8	derive			Interrupt 8, for device(s): 8-edge rtc0
9-fasteoi acpi	i9	derive			Interrupt 9, for device(s): 9-fasteoi acpi
12-edge i8042	i12	derive			Interrupt 12, for device(s): 12-edge i8042
16	i16	derive			Interrupt 16, for device(s): 16-fasteoi uhci_hcd:usb1, uhci_hcd:usb6, i801_smbus
17-fasteoi uhci_hcd:usb4, uhci_hcd:usb7	i17	derive			Interrupt 17, for device(s): 17-fasteoi uhci_hcd:usb4, uhci_hcd:usb7
18-fasteoi uhci_hcd:usb5, uhci_hcd:usb8	i18	derive			Interrupt 18, for device(s): 18-fasteoi uhci_hcd:usb5, uhci_hcd:usb8
19-fasteoi ehci_hcd:usb2, ehci_hcd:usb3	i19	derive			Interrupt 19, for device(s): 19-fasteoi ehci_hcd:usb2, ehci_hcd:usb3
20-fasteoi virtio0	i20	derive			Interrupt 20, for device(s): 20-fasteoi virtio0
0-edge PCIe PME, aerdrv	i24	derive			Interrupt 24, for device(s): 0-edge PCIe PME, aerdrv
0-edge PCIe PME, aerdrv	i25	derive			Interrupt 25, for device(s): 0-edge PCIe PME, aerdrv
0-edge PCIe PME, aerdrv	i26	derive			Interrupt 26, for device(s): 0-edge PCIe PME, aerdrv
0-edge PCIe PME, aerdrv	i27	derive			Interrupt 27, for device(s): 0-edge PCIe PME, aerdrv
0-edge ahci[0000:00:1f.2]	i28	derive			Interrupt 28, for device(s): 0-edge ahci[0000:00:1f.2]
0-edge virtio3-config	i29	derive			Interrupt 29, for device(s): 0-edge virtio3-config
1-edge virtio3-control	i30	derive			Interrupt 30, for device(s): 1-edge virtio3-control
2-edge virtio3-event	i31	derive			Interrupt 31, for device(s): 2-edge virtio3-event
3-edge virtio3-request	i32	derive			Interrupt 32, for device(s): 3-edge virtio3-request
0-edge virtio4-config	i33	derive			Interrupt 33, for device(s): 0-edge virtio4-config
1-edge virtio4-control	i34	derive			Interrupt 34, for device(s): 1-edge virtio4-control
2-edge virtio4-event	i35	derive			Interrupt 35, for device(s): 2-edge virtio4-event
3-edge virtio4-request	i36	derive			Interrupt 36, for device(s): 3-edge virtio4-request
0-edge virtio1-config	i37	derive			Interrupt 37, for device(s): 0-edge virtio1-config
1-edge virtio1-virtqueues	i38	derive			Interrupt 38, for device(s): 1-edge virtio1-virtqueues
0-edge virtio2-config	i39	derive			Interrupt 39, for device(s): 0-edge virtio2-config
1-edge virtio2-input.0	i40	derive			Interrupt 40, for device(s): 1-edge virtio2-input.0
2-edge virtio2-output.0	i41	derive			Interrupt 41, for device(s): 2-edge virtio2-output.0
0-edge snd_hda_intel:card0	i42	derive			Interrupt 42, for device(s): 0-edge snd_hda_intel:card0
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
Deferred Error APIC interrupts	iDFR	derive			Interrupt DFR, for device(s): Deferred Error 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
Posted-interrupt notification event	iPIN	derive			Interrupt PIN, for device(s): Posted-interrupt notification event
Nested posted-interrupt event	iNPI	derive			Interrupt NPI, for device(s): Nested posted-interrupt event
Posted-interrupt wakeup event	iPIW	derive			Interrupt PIW, for device(s): Posted-interrupt wakeup event
Posted MSI notification event	iPMN	derive			Interrupt PMN, for device(s): Posted MSI notification event