Provides a mask of cpus which irqbalance should ignore and never
assign interrupts to
面具是什么意思？我在哪里配置irqbalance与该选项？
编辑1：如何知道我的配置生效,换句话说我的cpu没有收到中断？我正在检查/ proc / interrupts但是有些数字正在增加.
EDIT2：现在我用IRQBALANCE_BANNED_cpuS = 3e启动了我的机器,所以只有cpu 0不被禁止中断.所以我应该期待看到cpo0收到很多中断而另一个cpus没有收到中断,对吧？这是我的/ proc / interrupts.粗体的行正在改变所有cpu.第22,24,35和LOC行正在改变.
cpu0 cpu1 cpu2 cpu3 cpu4 cpu5 0: 26 0 0 0 0 0 IO-APIC-edge timer 1: 2 0 0 0 0 0 IO-APIC-edge i8042 6: 3 0 0 0 0 0 IO-APIC-edge floppy 8: 1 0 0 0 0 0 IO-APIC-edge rtc0 9: 0 0 0 0 0 0 IO-APIC-fasteoi acpi 12: 4 0 0 0 0 0 IO-APIC-edge i8042 14: 13556 0 0 0 0 0 IO-APIC-edge ata_piix 15: 0 0 0 0 0 0 IO-APIC-edge ata_piix 18: 0 0 0 0 0 0 IO-APIC-fasteoi ata_piix 19: 2 0 0 0 0 0 IO-APIC-fasteoi ohci1394 20: 3 0 0 0 0 0 IO-APIC-fasteoi ehci_hcd:usb2,uhci_hcd:usb3,uhci_hcd:usb6 21: 197 635 39 0 0 0 IO-APIC-fasteoi uhci_hcd:usb4,uhci_hcd:usb7,HDA Intel 22: 344 3506 0 702 0 0 IO-APIC-fasteoi ehci_hcd:usb1,uhci_hcd:usb5,uhci_hcd:usb8 24: 162 48 0 0 0 0 IO-APIC-fasteoi nvidia 35: 174 0 47 0 0 0 IO-APIC-fasteoi nvidia 53: 3517 0 0 0 0 0 PCI-MSI-edge eth0 NMI: 0 0 0 0 0 0 Non-maskable interrupts LOC: 11007 8840 6480 5652 4272 3046 Local timer interrupts SPU: 0 0 0 0 0 0 SpurIoUs interrupts PMI: 0 0 0 0 0 0 Performance monitoring interrupts PND: 0 0 0 0 0 0 Performance pending work RES: 292 169 217 125 122 126 Rescheduling interrupts CAL: 86 280 254 292 293 291 Function call interrupts TLB: 1147 1031 1348 616 177 322 TLB shootdowns TRM: 0 0 0 0 0 0 Thermal event interrupts THR: 0 0 0 0 0 0 Threshold APIC interrupts MCE: 0 0 0 0 0 0 Machine check exceptions MCP: 2 2 2 2 2 2 Machine check polls ERR: 5 MIS: 0
EDIT3：看起来IRQBALANCE_BANNED_cpuS选项在Ubuntu上完全是IGNORED.我尝试用1,3e重启我的机器并且全部中断了.就在我通过设置ENABLED = 0来禁用irqbalance时,我在cpu0上得到一个干净/ proc /中断而没有其他cpu.
解决方法
This is a hex mask without the leading ‘0x’,on systems with large
numbers of processors each group of eight hex digits is sepearated ba
a comma ‘,’. i.e.export IRQBALANCE_BANNED_cpuS=fc0would prevent
irqbalance from assigning irqs to the 7th-12th cpus (cpu6-cpu11) or
export IRQBALANCE_BANNED_cpuS=ff000000,00000001would prevent
irqbalance from assigning irqs to the 1st (cpu0) and 57th-64th cpus
(cpu56-cpu63).
concept of a mask在维基百科上有解释.阅读,然后回来.让我们分解一下Red Hat的第一个例子.以十六进制写入fc0的数字以二进制形式写为111111000000.从右到左扫描(即从least significant bit到most significant bit),有六个零.这意味着可以为1st-5th cpu(cpu0-cpu5)分配中断.然后,有六个.这意味着不会为第7-12个cpu(cpu6-cpu11)分配中断.
听起来你想让cpu0和cpu1接收中断但是阻止cpu2,cpu3,cpu4和cpu5被分配中断.这意味着你需要两个零和四个,或111100.这是十六进制的3C.所以,你要用内容创建/ etc / default / irqbalance
ENABLED="1" ONESHOT="0" IRQBALANCE_BANNED_cpuS="3f"
要了解发生了什么,请尝试
$sudo service irqbalance stop Stopping SMP IRQ Balancer: irqbalance. $source /etc/default/irqbalance $sudo irqbalance --debug
