Hi all,
I am experiencing high CPU usage by [ksoftirqd/0] and STAs are being kicked off the network.
Only 3 to 4 STA connected and usage is just regular traffic, facebook, youtube, slack and email.
This AP is NOT doing NAT, it's being used a dumbAP which is connected to linux router.
As you can see: sirq is 100% and [ksoftirqd/0] is 77%.
Mem: 129344K used, 124612K free, 752K shrd, 3960K buff, 12696K cached
CPU: 0% usr 0% sys 0% nic 0% idle 0% io 0% irq 100% sirq
Load average: 1.26 1.00 0.73 2/40 12835
PID PPID USER STAT VSZ %VSZ %CPU COMMAND
7 2 root RW 0 0% 77% [ksoftirqd/0]
1558 1 root S 4408 2% 8% /usr/sbin/hostapd -s -P /var/run/wifi-phy0.pid -B /var/run/ho
12835 12811 root R 1200 0% 8% top -d2
12786 2 root IW 0 0% 8% [kworker/0:0]
1543 1 root S 4364 2% 0% /usr/sbin/hostapd -s -P /var/run/wifi-phy1.pid -B /var/run/ho
932 1 root S 3684 1% 0% /usr/sbin/sshd -D
12809 932 root S 3676 1% 0% sshd: root@pts/0
879 1 root S 1760 1% 0% /sbin/netifd
1 0 root S 1556 1% 0% /sbin/procd
822 1 root S 1280 1% 0% /sbin/logd -S 64
482 1 root S 1220 0% 0% /sbin/ubusd
12811 12809 root S 1212 0% 0% -ash
1201 1 root S< 1204 0% 0% /usr/sbin/ntpd -n -N -S /usr/sbin/ntpd-hotplug -p 0.openwrt.p
1161 879 root S 1200 0% 0% udhcpc -p /var/run/udhcpc-br-lan.pid -s /lib/netifd/dhcp.scri
500 1 root S 1016 0% 0% /sbin/urngd
483 1 root S 912 0% 0% /sbin/askfirst /usr/libexec/login.sh
11400 2 root IW 0 0% 0% [kworker/u2:2]
12766 2 root IW 0 0% 0% [kworker/u2:1]
196 2 root SW 0 0% 0% [spi0]
432 2 root SWN 0 0% 0% [jffs2_gcd_mtd5]
581 2 root IW< 0 0% 0% [ath10k_wq]
568 2 root IW< 0 0% 0% [cfg80211]
582 2 root IW< 0 0% 0% [ath10k_aux_wq]
366 2 root IW< 0 0% 0% [kworker/0:1H]
91 2 root IW< 0 0% 0% [kblockd]
89 2 root IW< 0 0% 0% [crypto]
127 2 root SW 0 0% 0% [kswapd0]
340 2 root IW< 0 0% 0% [ipv6_addrconf]
42 2 root SW 0 0% 0% [oom_reaper]
8 2 root IW< 0 0% 0% [netns]
86 2 root IW< 0 0% 0% [writeback]
6 2 root IW< 0 0% 0% [mm_percpu_wq]
2 0 root SW 0 0% 0% [kthreadd]
4 2 root IW< 0 0% 0% [kworker/0:0H]
88 2 root SW 0 0% 0% [kcompactd0]
359 2 root IW< 0 0% 0% [dsa_ordered]
447 2 root IW 0 0% 0% [kworker/0:2]
cat /proc/interrupts
CPU0
4: 39 MIPS 4 eth0
5: 213867404 MIPS 5 eth1
7: 338230957 MIPS 7 timer
11: 26 MISC 3 ttyS0
40: 687755401 AR724X PCI ath10k_pci
47: 475677693 dummy ath9k
48: 0 dummy ehci_hcd:usb1
49: 0 dummy ehci_hcd:usb2
ERR: 240281
OpenWRT info
version r10316-8bdf50e9af
compiled from snapshot
DISTRIB_REVISION='78e5018'
DISTRIB_TARGET='ar71xx/generic'
DISTRIB_ARCH='mips_24kc'
Compiled on = 2019-06-25
/etc/config/firewall
config defaults
option syn_flood '1'
option input 'ACCEPT'
option output 'ACCEPT'
option forward 'REJECT'
config zone
option name 'lan'
list network 'lan'
option input 'ACCEPT'
option output 'ACCEPT'
option forward 'ACCEPT'
config include
option path '/etc/firewall.user'
/etc/config/network
config interface 'loopback'
option ifname 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'
config globals 'globals'
option ula_prefix 'fd11:bfbc:c18c::/48'
config interface 'service'
option ifname 'eth0.1'
option proto 'static'
option ipaddr '192.168.100.1'
option netmask '255.255.255.0'
config interface 'lan'
option type 'bridge'
option ifname 'eth1.2'
option proto 'dhcp'
config interface 'private'
option auto '1'
option proto 'none'
option type 'bridge'
option ifname 'eth1.3'
config interface 'guest'
option auto '1'
option proto 'none'
option type 'bridge'
option ifname 'eth1.4'
config switch
option name 'switch0'
option reset '1'
option enable_vlan '1'
config switch_vlan
option device 'switch0'
option vlan '1'
option ports '2 0t'
config switch_vlan
option device 'switch0'
option vlan '2'
option ports '1t 6t'
config switch_vlan
option device 'switch0'
option vlan '3'
option ports '1t 6t'
config switch_vlan
option device 'switch0'
option vlan '4'
option ports '1t 6t'
/etc/config/wireless
config wifi-device 'radio0'
option type 'mac80211'
option path 'pci0000:00/0000:00:00.0'
option country 'US'
option hwmode '11a'
option htmode 'VHT40'
option channel '36'
option txpower '13'
option basic_rate '12000 18000 24000 36000 48000 54000'
option supported_rates '12000 18000 24000 36000 48000 54000'
option log_level '3'
config wifi-device 'radio1'
option type 'mac80211'
option path 'platform/qca955x_wmac'
option country 'US'
option hwmode '11g'
option htmode 'HT20'
option channel '11'
option txpower '13'
option basic_rate '12000 18000 24000 36000 48000 54000'
option supported_rates '12000 18000 24000 36000 48000 54000'
option log_level '3'
config wifi-iface 'wlan0_ap'
option mode 'ap'
option device 'radio0'
option network 'private'
option ifname 'wlan0-ap'
option ssid 'xxx'
option encryption 'psk2'
option key 'xxx'
config wifi-iface 'wlan1_ap'
option mode 'ap'
option device 'radio1'
option network 'private'
option ifname 'wlan1-ap'
option ssid 'xxx'
option encryption 'psk2'
option key 'xxx'
It works well after restart, at least for more than two weeks.
Please let me know if any other information is needed.
Thanks