linux下查看中断请求记录 IRQ
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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
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 : <not added> 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 : <not added> MCP: Machine check polls : <not added> ERR: : ERROR_APIC_VECTOR MIS: : <not added> PLT: Platform interrupts : X86_PLATFORM_IPI_VECTOR
2. IO-APIC-edge timer
此处的timer为系统定时器.
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