linux下查看中断请求记录 IRQ

 

linux下查看中断请求记录。通过cpu的中断请求的响应，可以看出cpu都在为哪些设备干活，干的活有多少量等信息。

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

 

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注释：

1. 对部分IRQ标识的解释

Interrupt as in /proc/interrupts        Name as it appears in ftrace log
NMI: Non-maskable interrupts           : NMI_VECTOR
LOC: Local timer interrupts            : LOCAL_TIMER_VECTOR
SPU: Spurious interrupts               : SPURIOUS_APIC_VECTOR
PMI: Performance monitoring interrupts : 
PND: Performance pending work          : LOCAL_PENDING_VECTOR
RES: Rescheduling interrupts           : RESCHEDULE_VECTOR
CAL: Function call interrupts          : CALL_FUNCTION_VECTOR or
                                         CALL_FUNCTION_SINGLE_VECTOR
TLB: TLB shootdowns                    : INVALIDATE_TLB_VECTOR_START to
                                         INVALIDATE_TLB_VECTOR_END
TRM: Thermal event interrupts          : THERMAL_APIC_VECTOR
THR: Threshold APIC interrupts         : THRESHOLD_APIC_VECTOR
MCE: Machine check exceptions          : 
MCP: Machine check polls               : 
ERR:                                   : ERROR_APIC_VECTOR
MIS:                                   : 
PLT: Platform interrupts               : X86_PLATFORM_IPI_VECTOR

2. IO-APIC-edge  timer

此处的timer为系统定时器.