Irqbalance doesn't appear to have an effect

Installing and Using OpenWrt
1

I realize some IRQs cannot be balanced but I am not seeing any difference here in terms of what is being balanced. Hardware is RPi4. Is the conclusion that only irq11, IPI0, IPI1, and IPI5 can be balanced and that they are doing so by something else?

Any thoughts are appreciated.

With irqbalance:

           CPU0       CPU1       CPU2       CPU3
 11:   15081967   15068518    5342430    4361340     GICv2  30 Level     arch_timer
 14:     639535          0          0          0     GICv2  65 Level     fe00b880.mailbox
 17:         12          0          0          0     GICv2 153 Level     uart-pl011
 20:         31          0          0          0     GICv2 114 Level     DMA IRQ
 27:          1          0          0          0     GICv2  66 Level     VCHIQ doorbell
 28:     269012          0          0          0     GICv2 158 Level     mmc1, mmc0
 35:  459841672          0          0          0     GICv2 189 Level     eth0
 36:  351174703          0          0          0     GICv2 190 Level     eth0
 42:          0          0          0          0     GICv2 175 Level     PCIe PME, aerdrv
 43:   28925802          0          0          0  BRCM STB PCIe MSI 524288 Edge      xhci_hcd
IPI0:      9622      10363      10642      12569       Rescheduling interrupts
IPI1:    376961   97416958   74494146   94990913       Function call interrupts
IPI2:         0          0          0          0       CPU stop interrupts
IPI3:         0          0          0          0       CPU stop (for crash dump) interrupts
IPI4:         0          0          0          0       Timer broadcast interrupts
IPI5:   1065906     837730    1017399     764542       IRQ work interrupts
IPI6:         0          0          0          0       CPU wake-up interrupts
Err:          0

Without irqbalance:

# cat /proc/interrupts
           CPU0       CPU1       CPU2       CPU3       
 11:      46858    1587140      60911     443193     GICv2  30 Level     arch_timer
 14:       9620          0          0          0     GICv2  65 Level     fe00b880.mailbox
 17:         12          0          0          0     GICv2 153 Level     uart-pl011
 20:         31          0          0          0     GICv2 114 Level     DMA IRQ
 27:          1          0          0          0     GICv2  66 Level     VCHIQ doorbell
 28:      15676          0          0          0     GICv2 158 Level     mmc1, mmc0
 35:    5799505          0          0          0     GICv2 189 Level     eth0
 36:    3804625          0          0          0     GICv2 190 Level     eth0
 42:          0          0          0          0     GICv2 175 Level     PCIe PME, aerdrv
 43:     835746          0          0          0  BRCM STB PCIe MSI 524288 Edge      xhci_hcd
IPI0:      2675       2378       1987       1897       Rescheduling interrupts
IPI1:     25709    1645239     175854    1652499       Function call interrupts
IPI2:         0          0          0          0       CPU stop interrupts
IPI3:         0          0          0          0       CPU stop (for crash dump) interrupts
IPI4:         0          0          0          0       Timer broadcast interrupts
IPI5:      7390       3128      13045       4519       IRQ work interrupts
IPI6:         0          0          0          0       CPU wake-up interrupts
Err:          0
2

i also have rpi 4 and irqblance installed, I don't see any changes

3

Is irqbalance really enabled? If it's installed and the service is running doesn't mean that it's doing something.

cat /etc/config/irqbalance

config irqbalance 'irqbalance'
        option enabled '1'

I regularly forget that on new installations.

4

Yes, I have that in my /etc/confi/irqbalance and I do see it running ps | grep irqbalance

# cat /etc/config/irqbalance 
config irqbalance 'irqbalance'
	option enabled '1'

	# The default value is 10 seconds
	#option interval '10'

	# List of IRQ's to ignore
	#list banirq '36'
	#list banirq '69'