/proc/interrupts 文件中可以看到各个 CPU 上的中断情况。
CPU0
1: 9 IO-APIC 1-edge i8042
4: 71 IO-APIC 4-edge ttyS0
6: 3 IO-APIC 6-edge floppy
8: 0 IO-APIC 8-edge rtc0
9: 0 IO-APIC 9-fasteoi acpi
10: 0 IO-APIC 10-fasteoi virtio0
11: 33 IO-APIC 11-fasteoi uhci_hcd:usb1
12: 15 IO-APIC 12-edge i8042
14: 0 IO-APIC 14-edge ata_piix
15: 0 IO-APIC 15-edge ata_piix
24: 0 PCI-MSI 81920-edge virtio2-config
25: 4084278 PCI-MSI 81921-edge virtio2-req.0
26: 0 PCI-MSI 65536-edge virtio1-config
27: 16839249 PCI-MSI 65537-edge virtio1-input.0
28: 17694267 PCI-MSI 65538-edge virtio1-output.0
NMI: 0 Non-maskable interrupts
LOC: 2204291700 Local timer interrupts
SPU: 0 Spurious interrupts
PMI: 0 Performance monitoring interrupts
IWI: 1 IRQ work interrupts
RTR: 0 APIC ICR read retries
RES: 0 Rescheduling interrupts
CAL: 0 Function call interrupts
TLB: 0 TLB shootdowns
TRM: 0 Thermal event interrupts
THR: 0 Threshold APIC interrupts
DFR: 0 Deferred Error APIC interrupts
MCE: 0 Machine check exceptions
MCP: 105679 Machine check polls
ERR: 0
MIS: 0
PIN: 0 Posted-interrupt notification event
NPI: 0 Nested posted-interrupt event
PIW: 0 Posted-interrupt wakeup event
/proc/irq/[irq_num]/smp_affinity_list 可以查看指定中断当前绑定的 CPU。