After performing a processor upgrade, you should perform a new baseline and compare the results to the previous baseline values. Which of the following processor utilization measurement counters show the elapsed period that a processor is busy executing a non-idle thread?

A.
Percent of Interrupt Time

B.
Percent Processor Time.

C.
Interrupts Per Second

D.
Percent of Privileged Time

E.
Percent of User Time

Explanation:
The Percent Processor Time counter provides an indication of the elapsed period that a processor is busy executing a non-idle thread. You should assign an instance of this counter for each processor in the system. A counter value that is consistently over 90% could point to a CPU bottleneck.
Incorrect Answers:
A: The Percent of Interrupt Time counter provides an indication of the elapsed time that the processor spends handling hardware interrupts.
C: The Interrupts Per Second counter indicates the number of device interrupts the processor is currently experiencing. Whenever a device requires attention or completes a task, the device interrupts the processor.
D:
The Percent of Privileged Time indicates the processor time spent in Privileged Mode executing non-idle threads.
E: The Percent of User Time indicates the processor time spent in User Mode executing non-idle threads.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 345.