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catalyst 6500 cpu usage very high for Kernel

I cannot understand this show process cpu output that I'm seeing on a couple of catalyst 6500.

In particular I cannot understand the 96% of CPU usage for Kernel/Idle process while the global CPU is 5-6%

Does anybody have idea of this ?

CEDACRINORD_6500_C> (enable) sh proc cp

CPU utilization for five seconds: 3.30%

one minute: 4.00%

five minutes: 4.00%

PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process

--- ----------- ---------- -------- ------- ------- ------- --- ---------------

1 0 0 0 96.70% 96.00% 96.00% -2 Kernel and Idle

2 2 68 1000 0.00% 0.00% 0.00% -2 Flash MIB Updat

3 0 1 0 0.00% 0.00% 0.00% -2 L2L3IntHdlr

4 0 1 0 0.00% 0.00% 0.00% -2 L2L3PatchRev

..............................

2 ACCEPTED SOLUTIONS

Accepted Solutions
Cisco Employee

Re: catalyst 6500 cpu usage very high for Kernel

That is the idle CPU and expected to be close to 100%

New Member

Re: catalyst 6500 cpu usage very high for Kernel

It is self explanatory.

Your case 4% is the actual processor utilization.

Which will increase if any new process is running.

So processor is idle for 96% and which will reduce if any new process gets started.

processor % utilization = 100% - idle % utilization

4 REPLIES
Cisco Employee

Re: catalyst 6500 cpu usage very high for Kernel

That is the idle CPU and expected to be close to 100%

New Member

Re: catalyst 6500 cpu usage very high for Kernel

Could I ask you the reason of this ?

Marco

New Member

Re: catalyst 6500 cpu usage very high for Kernel

It is self explanatory.

Your case 4% is the actual processor utilization.

Which will increase if any new process is running.

So processor is idle for 96% and which will reduce if any new process gets started.

processor % utilization = 100% - idle % utilization

New Member

Re: catalyst 6500 cpu usage very high for Kernel

Ahh ok so I understand now what it means. It's the CPU free....

Thanks to both of you: I thought it was a kind of background usage,

Marco

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