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Cisco Bug: CSCuq96561 - High CPU due to interrupts in time_it

Last Modified

Sep 14, 2019

Products (1)

  • Cisco 3900 Series Integrated Services Routers

Known Affected Releases

n/a

Description (partial)

Symptom:
High CPU is seen due to interrupts with low traffic rate:

oppenheimer-co2#sh proc cpu sort 1min
CPU utilization for five seconds: 81%/80%; one minute: 81%; five minutes: 81%
 PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process 
  87     8251776     9712906        849  0.23%  0.20%  0.21%   0 Netclock Backgro 

Interface Summary Interface 	RxBps 	RxPps 	TxBps 	TxPps 	Status 	Line Protocol
GigabitEthernet0/0	207,000	20	2,000	6	up	up
ATM1/0	28,000	29	536,000	59	up	up
Tunnel0	5,000	10	216,000	19	up	up
TOTAL	241,000	61	754,000	84	-	-


After execute CPU profiling we can see that time_it is the function which is consuming the CPU (contact CISCO support)

Conditions:
N/A
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