CPU绑定和IRQ相关

查看cpu在干嘛

[root@zwserver ~]# mpstat -P ALL 1
Linux 3.10.0-693.el7.x86_64 (zwserver)  2018年04月10日  _x86_64_        (4 CPU)

19时43分23秒  CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle
19时43分24秒  all    1.52    0.00    0.51    1.77    0.00    0.00    0.00    0.00    0.00   96.21
19时43分24秒    0    1.02    0.00    0.00    2.04    0.00    0.00    0.00    0.00    0.00   96.94
19时43分24秒    1    1.03    0.00    0.00    4.12    0.00    0.00    0.00    0.00    0.00   94.85
19时43分24秒    2    1.98    0.00    0.99    0.00    0.00    0.00    0.00    0.00    0.00   97.03
19时43分24秒    3    2.04    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00   97.96

开机以来每个核处理的中断数

[root@zwserver ~]# cat /proc/interrupts 
           CPU0       CPU1       CPU2       CPU3       
  0:         29          0          0          0   IO-APIC-edge      timer
  1:          1          1          0          1   IO-APIC-edge      i8042
  4:          6         10          0          0   IO-APIC-edge    
  8:          1          0          0          0   IO-APIC-edge      rtc0
  9:          3          1          0          0   IO-APIC-fasteoi   acpi
 12:          3          1          0          0   IO-APIC-edge      i8042
 23:         38         17          7          0   IO-APIC-fasteoi   ehci_hcd:usb1, ehci_hcd:usb2
 25:          0          0          0          0   PCI-MSI-edge      xhci_hcd
 26:          0          0          0          0   PCI-MSI-edge      xhci_hcd
 27:          0          0          0          0   PCI-MSI-edge      xhci_hcd
 28:          0          0          0          0   PCI-MSI-edge      xhci_hcd
 29:          0          0          0          0   PCI-MSI-edge      xhci_hcd
 30:          0          0          0          0   PCI-MSI-edge      xhci_hcd
 31:         53         24         14   98241678   PCI-MSI-edge      enp3s0
 32:       8148       1251   76956018        811   PCI-MSI-edge      0000:00:1f.2
 33:          0          0          0          0   PCI-MSI-edge      0000:05:00.0
 34:         27         68         24         16   PCI-MSI-edge      i915
 35:         11          0          0          2   PCI-MSI-edge      mei_me
 36:       2052        550        963        449   PCI-MSI-edge      snd_hda_intel
NMI:         47         44         70         63   Non-maskable interrupts
LOC:  180304042  173658741  177585128  265738389   Local timer interrupts
SPU:          0          0          0          0   Spurious interrupts
PMI:         47         44         70         63   Performance monitoring interrupts
IWI:    3816198    4088246    3907519   11878402   IRQ work interrupts
RTR:          0          0          0          0   APIC ICR read retries
RES:    2349853    2011657    2028842    3954050   Rescheduling interrupts
CAL:     806796     909229     955708     719201   Function call interrupts
TLB:    1934363    1820010    2060402    1795831   TLB shootdowns
TRM:          0          0          0          0   Thermal event interrupts
THR:          0          0          0          0   Threshold APIC interrupts
DFR:          0          0          0          0   Deferred Error APIC interrupts
MCE:          0          0          0          0   Machine check exceptions
MCP:       1276       1276       1276       1276   Machine check polls
ERR:          0
MIS:          0
PIN:          0          0          0          0   Posted-interrupt notification event
PIW:          0          0          0          0   Posted-interrupt wakeup event

参考文章: [Linux 性能调优] 网卡中断与CPU的绑定问题 https://www.cnblogs.com/bamanzi/p/linux-irq-and-cpu-affinity.html