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Cisco Bug: CSCus28046 - high CPU @linux_iosd-imag

Last Modified

Sep 14, 2019

Products (1)

  • Cisco IOS

Known Affected Releases

15.2(4)S4.1

Description (partial)

Symptom:
High CPU because of linux_iosd-imag. 
We did not see any CPU with show process cpu sorted but  "monitor  platform  so pro r0" shows 
linux_iosd-imag is showing close to 92% CPU.

During high CPU, scheduler also reaches close to 60%

sh platform software infrastructure thread scheduler
Statistics for IOS scheduler activities:
0 msec minimum clock runtime, 7406 msec maximum clock runtime
0 msec minimum cpu runtime, 6972 msec maximum cpu runtime
0 msec minimum sleep time, 39 msec maximum sleep time,  66059 interrupted
2592946 IOS Scheduler invocation, 88017 idle
1383 sec wallclock, (27%) IOS tasks, (59%) scheduler, (12%) sleep

Conditions:
Conditions for this process to go high is still unknown and under investigation. This apperas to be a very rare corner case which is happening on one particular router.

Related Community Discussions

High CPU Usage on 3850
I have a stack of 5  WS-C3850-48P running IOS 16.3.6.   A newer IOS has not been authorized yet for my company so upgrading IOS is not an option.    I saw a bug in the older IOS 16.3.3 that the IOSD ipc task would max out the CPU.   I have multiple 3850's running 16.3.6 with no issue but in one case the IOSD ipc task is causing the CPU to run at a constant 70 to 90 percent.    I am monitoring this device's CPU with Prime Infrastructure 3.4 and below is a copy of the command "show process cpu | ex ...
Latest activity: Jul 27, 2018
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