Service graphs
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 |
Warn |
Crit |
Info |
| timer |
i0 |
derive |
|
|
Interrupt 0, for device(s): timer |
| i8042 |
i1 |
derive |
|
|
Interrupt 1, for device(s): i8042 |
| floppy |
i6 |
derive |
|
|
Interrupt 6, for device(s): floppy |
| parport0 |
i7 |
derive |
|
|
Interrupt 7, for device(s): parport0 |
| rtc |
i8 |
derive |
|
|
Interrupt 8, for device(s): rtc |
| acpi |
i9 |
derive |
|
|
Interrupt 9, for device(s): acpi |
| i8042 |
i12 |
derive |
|
|
Interrupt 12, for device(s): i8042 |
| eth0 |
i50 |
derive |
|
|
Interrupt 50, for device(s): eth0 |
| eth1 |
i58 |
derive |
|
|
Interrupt 58, for device(s): eth1 |
| ehci_hcd:usb1, sata_nv |
i201 |
derive |
|
|
Interrupt 201, for device(s): ehci_hcd:usb1, sata_nv |
| ohci_hcd:usb2 |
i209 |
derive |
|
|
Interrupt 209, for device(s): ohci_hcd:usb2 |
| megaraid |
i217 |
derive |
|
|
Interrupt 217, for device(s): megaraid |
| sata_nv |
i225 |
derive |
|
|
Interrupt 225, for device(s): sata_nv |
| sata_nv |
i233 |
derive |
|
|
Interrupt 233, for device(s): sata_nv |
| NMI |
iNMI |
derive |
|
|
Nonmaskable interrupt. Either 0 or quite high. If it's normaly 0 then just one NMI will often mark some hardware failure. |
| LOC |
iLOC |
derive |
|
|
Local (pr. CPU core) APIC timer interrupt. Until 2.6.21 normaly 250 or 1000 pr second. On modern 'tickless' kernels it more or less reflects how busy the machine is. |
| ERR |
iERR |
derive |
|
|
|
| MIS |
iMIS |
derive |
|
|
|
