[Ubiquiti_UniFi_UAP_Access_Point] Unifi AP: High CPU utilization (over 90% for 5m)

[ciaranfmff]

Model
U6 Enterprise

Device Version
6.8.2

my cpu utilization shown in zabbix and my cpu utilization shown in unifi don't match.

it looks like its almost a +100 error? like instead of 118% its really 18% but I'm not sure.

[ciaranfmff]

looking at it closer it might actually be seeing the load average numbers as percent

[hermanekt]

Hi @ciaranfmff,

quick question i have suspicion you have more then 1 CPUs and system says 118 as 100 +18 usage on both processors or more.

The UniFi U6 Enterprise has one main dual-core processor — a Qualcomm ARM Cortex-A53 running at approximately 1 GHz. It also has separate chips for the 2.4, 5, and 6 GHz Wi-Fi radios.

In your case 200 is maximum. It is not good to have template in this conditions but we don't have this HW in our office right now for testing and fix. What you can do is increase trigger for something like 180%.

Tom

[ciaranfmff]

ok so if I go through all my U6E hosts and set the macro {$CPU.UTIL.CRIT} to 180 it should solve my problem until you update the template?

[ciaranfmff]

what would be the correct value for U7 Pro Max? I just noticed that I am also seeing the same thing on my U7 Pro Max.

ubnt@U7-Pro-Max:~# cat /proc/cpuinfo
processor       : 0
model name      : ARMv7 Processor rev 4 (v7l)
BogoMIPS        : 90.00
Features        : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm aes pmull sha1 sha2 crc32
CPU implementer : 0x51
CPU architecture: 7
CPU variant     : 0xa
CPU part        : 0x801
CPU revision    : 4

processor       : 1
model name      : ARMv7 Processor rev 4 (v7l)
BogoMIPS        : 90.00
Features        : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm aes pmull sha1 sha2 crc32
CPU implementer : 0x51
CPU architecture: 7
CPU variant     : 0xa
CPU part        : 0x801
CPU revision    : 4

processor       : 2
model name      : ARMv7 Processor rev 4 (v7l)
BogoMIPS        : 90.00
Features        : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm aes pmull sha1 sha2 crc32
CPU implementer : 0x51
CPU architecture: 7
CPU variant     : 0xa
CPU part        : 0x801
CPU revision    : 4

processor       : 3
model name      : ARMv7 Processor rev 4 (v7l)
BogoMIPS        : 90.00
Features        : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm aes pmull sha1 sha2 crc32
CPU implementer : 0x51
CPU architecture: 7
CPU variant     : 0xa
CPU part        : 0x801
CPU revision    : 4

Hardware        : Generic DT based system
Revision        : 0000
Serial          : 0000000000000000
ubnt@U7-Pro-Max:~#

looks like 400% would be full load so I should go for 360?

[hermanekt]

One CPU is 100% for 4 CPUs is 400% max i think everything more then 300 is suspicious.

[ciaranfmff]

I verified the u6 enterprise has a dual core cpu

# cat /proc/cpuinfo
processor       : 0
model name      : ARMv7 Processor rev 4 (v7l)
BogoMIPS        : 78.00
Features        : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm aes pmull sha1 sha2 crc32
CPU implementer : 0x51
CPU architecture: 7
CPU variant     : 0xa
CPU part        : 0x801
CPU revision    : 4

processor       : 1
model name      : ARMv7 Processor rev 4 (v7l)
BogoMIPS        : 78.00
Features        : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm aes pmull sha1 sha2 crc32
CPU implementer : 0x51
CPU architecture: 7
CPU variant     : 0xa
CPU part        : 0x801
CPU revision    : 4

Hardware        : Generic DT based system
Revision        : 0000
Serial          : 000000000000000