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CPU utilization

I have a Cat6 router which show the CPU utilization for 5Min is 10%, however when i tried to added up the CPU process of each PID for 5Min,

the total is only 4.33%.. Not sure where is the rest of the % gone to as it does not show it in "Show cpu processes"

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‎12-29-2009 10:27 PM
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The IOS is

IOS (tm) s72033_rp Software (s72033_rp-PK9SV-M), Version 12.2(18)SXD5, RELEASE SOFTWARE (fc3)

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as shown in the link below :

the cpu is used by both :


2.interrupt level

in our case, 10% is the total cpu utilization

4.33% for the process

5.66% time spent at the interrupt level

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How do get the 5.66% for the time spent at the interrupt level ?

The interrupt level is only at 5 sec not 5 min and is stated at 3% interrupt at 5 sec.