my router is Xiaomi Router 3G v1
when it was on openwrt 19.07, almost everything fine, at least the network is fast.
when i had flashed 21.02, i have got many times of ksoftirqd high cpu usage notifition, and the network became very slow. i thought it would be fixed in the new version and i kept update to the last versions, but till now the issue still here. i searched on internet something about ksoftirqd but i still how to fixed it. here is some infomation may be helpful.
$ cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
8: 177891371 177891360 177891430 177891406 MIPS GIC Local 1 timer
9: 25820525 0 0 0 MIPS GIC 63 IPI call
10: 0 32282436 0 0 MIPS GIC 64 IPI call
11: 0 0 40719383 0 MIPS GIC 65 IPI call
12: 0 0 0 31543117 MIPS GIC 66 IPI call
13: 113883032 0 0 0 MIPS GIC 67 IPI resched
14: 0 128889050 0 0 MIPS GIC 68 IPI resched
15: 0 0 36985722 0 MIPS GIC 69 IPI resched
16: 0 0 0 65349319 MIPS GIC 70 IPI resched
17: 0 0 0 0 MIPS GIC 19 1e000600.gpio-bank0, 1e000600.gpio-ba
19: 12 0 0 0 MIPS GIC 33 ttyS0
20: 6566257 0 0 0 MIPS GIC 29 xhci-hcd:usb1
21: 167918023 0 0 0 MIPS GIC 10 1e100000.ethernet
23: 16696 0 189573464 0 MIPS GIC 11 mt7603e
24: 3187 0 0 92990258 MIPS GIC 31 mt76x2e
26: 0 0 0 0 1e000600.gpio 18 keys
ERR: 52852
how could i get some help from openwrt offical developers?