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4. irqstats

Graph information

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	Warning	Critical	Info
timer	i0	derive			Interrupt 0, for device(s): timer
i8042	i1	derive			Interrupt 1, for device(s): i8042
cascade	i2	derive			Interrupt 2, for device(s): cascade
serial	i4	derive			Interrupt 4, for device(s): serial
ohci_hcd:usb2	i5	derive			Interrupt 5, for device(s): ohci_hcd:usb2
7	i7	derive
rtc0	i8	derive			Interrupt 8, for device(s): rtc0
ehci_hcd:usb1, eth0, eth1	i9	derive			Interrupt 9, for device(s): ehci_hcd:usb1, eth0, eth1
pata_rdc	i14	derive			Interrupt 14, for device(s): pata_rdc
pata_rdc	i15	derive			Interrupt 15, for device(s): pata_rdc
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
Hypervisor callback interrupts	iHYP	derive			Interrupt HYP, for device(s): Hypervisor callback interrupts
ERR	iERR	derive
MIS	iMIS	derive