Hi, Jeff. Some perf counter values require companion base counter values and must be averaged over two successive readings.
PS C:\> Get-NaPerfCounter processor
BaseCounter : processor_elapsed_time
Desc : Percentage of elapsed time that the processor is executing non-idle processes
Name : processor_busy
PrivilegeLevel : basic
Properties : percent
Unit : percent
So to get the processor busy percentage, get the values twice with an interval of a few seconds in between. Then do:
CPU % = (value_t2 - value_t1) / (base_t2 - base_t1) * 100
See 'Get-Help Get-NaPerfObject' for more details on working with the Data ONTAP performance APIs.