linux下查看插斷要求記錄 IRQ

linux下查看插斷要求記錄。通過cpu的插斷要求的響應，可以看出cpu都在為哪些裝置幹活，乾的活有多少量等資訊。

 

1. [~]$ cat /proc/interrupts    
2.            CPU0       CPU1       CPU2       CPU3          
3.   0: 1383283707          0          0          0    IO-APIC-edge  timer
     
4.   1:          3          0          0          0    IO-APIC-edge  i8042
     
5.   3:         11          0          0          0    IO-APIC-edge  serial
     
6.   8:          1          0          0          0    IO-APIC-edge  rtc
     
7.   9:          0          0          0          0   IO-APIC-level  acpi
     
8.  12:          4          0          0          0    IO-APIC-edge  i8042
     
9.  14:         25          0          0          0    IO-APIC-edge  ide0
     
10.  82:         85          0          0          0   IO-APIC-level  uhci_hcd:usb5
      
11.  90:         96          0          0          0   IO-APIC-level  uhci_hcd:usb6
      
12. 114:    1067499          0          0          0       PCI-MSI-X  cciss0
      
13. 130:   96508322          0          0          0         PCI-MSI  eth0
      
14. 138:     384295          0          0          0         PCI-MSI  eth1
      
15. 169:          0          0          0          0   IO-APIC-level  ehci_hcd:usb1, uhci_hcd:usb2
      
16. 177:          0          0          0          0   IO-APIC-level  uhci_hcd:usb3
      
17. 185:          0          0          0          0   IO-APIC-level  uhci_hcd:usb4
      
18. NMI:      11370       6399       6845       6300    
19. LOC: 1383174675 1383278112 1383174810 1383277705    
20. ERR:          0  
21. MIS:          0  

[~]$ cat /proc/interrupts<br /> CPU0 CPU1 CPU2 CPU3<br /> 0: 1383283707 0 0 0 IO-APIC-edge timer<br /> 1: 3 0 0 0 IO-APIC-edge i8042<br /> 3: 11 0 0 0 IO-APIC-edge serial<br /> 8: 1 0 0 0 IO-APIC-edge rtc<br /> 9: 0 0 0 0 IO-APIC-level acpi<br /> 12: 4 0 0 0 IO-APIC-edge i8042<br /> 14: 25 0 0 0 IO-APIC-edge ide0<br /> 82: 85 0 0 0 IO-APIC-level uhci_hcd:usb5<br /> 90: 96 0 0 0 IO-APIC-level uhci_hcd:usb6<br />114: 1067499 0 0 0 PCI-MSI-X cciss0<br />130: 96508322 0 0 0 PCI-MSI eth0<br />138: 384295 0 0 0 PCI-MSI eth1<br />169: 0 0 0 0 IO-APIC-level ehci_hcd:usb1, uhci_hcd:usb2<br />177: 0 0 0 0 IO-APIC-level uhci_hcd:usb3<br />185: 0 0 0 0 IO-APIC-level uhci_hcd:usb4<br />NMI: 11370 6399 6845 6300<br />LOC: 1383174675 1383278112 1383174810 1383277705<br />ERR: 0<br />MIS: 0 

---------------------------------------------------------------------------------------------------------

注釋：

1. 對部分IRQ標識的解釋

Interrupt as in /proc/interrupts        Name as it appears in ftrace logNMI: Non-maskable interrupts           : NMI_VECTORLOC: Local timer interrupts            : LOCAL_TIMER_VECTORSPU: Spurious interrupts               : SPURIOUS_APIC_VECTORPMI: Performance monitoring interrupts : <not added>PND: Performance pending work          : LOCAL_PENDING_VECTORRES: Rescheduling interrupts           : RESCHEDULE_VECTORCAL: Function call interrupts          : CALL_FUNCTION_VECTOR or                                         CALL_FUNCTION_SINGLE_VECTORTLB: TLB shootdowns                    : INVALIDATE_TLB_VECTOR_START to                                         INVALIDATE_TLB_VECTOR_ENDTRM: Thermal event interrupts          : THERMAL_APIC_VECTORTHR: Threshold APIC interrupts         : THRESHOLD_APIC_VECTORMCE: Machine check exceptions          : <not added>MCP: Machine check polls               : <not added>ERR:                                   : ERROR_APIC_VECTORMIS:                                   : <not added>PLT: Platform interrupts               : X86_PLATFORM_IPI_VECTOR

2. IO-APIC-edge  timer

此處的timer為系統定時器.