@FabricPath . 设置了 smp_affinity_list 。eth0 为 wan ，eth1 （ 10g 测试机连接），eth2 ，eth3 为 lan 。 （ 51,56,61 ，66 应该就是管理中断）
root@OpenWrt:~# grep eth /proc/interrupts
47: 11684059 0 0 0 ICU-NSR 39 Level eth0
48: 0 1767000 0 0 ICU-NSR 43 Level eth0
49: 0 0 1748609 0 ICU-NSR 47 Level eth0
50: 0 0 0 2103639 ICU-NSR 51 Level eth0
51: 4 0 0 0 ICU-NSR 129 Level eth0
52: 5962016 0 0 0 ICU-NSR 39 Level eth1
53: 0 873775 0 0 ICU-NSR 43 Level eth1
54: 0 0 957364 0 ICU-NSR 47 Level eth1
55: 0 0 0 566200 ICU-NSR 51 Level eth1
56: 16 0 0 0 ICU-NSR 129 Level eth1
57: 7114790 0 0 0 ICU-NSR 40 Level eth2
58: 0 82885 0 0 ICU-NSR 44 Level eth2
59: 0 0 71360 0 ICU-NSR 48 Level eth2
60: 0 0 0 107930 ICU-NSR 52 Level eth2
61: 1 0 0 0 ICU-NSR 128 Level eth2
62: 0 0 0 0 ICU-NSR 41 Level eth3
63: 0 0 0 0 ICU-NSR 45 Level eth3
64: 0 0 0 0 ICU-NSR 49 Level eth3
65: 0 0 0 0 ICU-NSR 53 Level eth3
66: 0 0 0 0 ICU-NSR 127 Level eth3

root@OpenWrt:~# cat /proc/irq/47/smp_affinity_list
0
root@OpenWrt:~# cat /proc/irq/48/smp_affinity_list
1
root@OpenWrt:~# cat /proc/irq/49/smp_affinity_list
2
root@OpenWrt:~# cat /proc/irq/50/smp_affinity_list
3
root@OpenWrt:~# cat /proc/irq/52/smp_affinity_list
0
root@OpenWrt:~# cat /proc/irq/53/smp_affinity_list
1
root@OpenWrt:~# cat /proc/irq/54/smp_affinity_list
2
root@OpenWrt:~# cat /proc/irq/55/smp_affinity_list
3

但从测试看，没有 rps 分布均匀。所以跑到较好的速度的概率小很多。可能要跑个 pt/bt 下载才能知道。speedtest session 太少了。
root@OpenWrt:~# ethtool -n eth0 rx-flow-hash tcp4
TCP over IPV4 flows use these fields for computing Hash flow key:
IP SA
IP DA
L4 bytes 0 & 1 [TCP/UDP src port]
L4 bytes 2 & 3 [TCP/UDP dst port]