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 provides an indication of the elapsed time that the processor spends handling hardware interrupts?

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 of Interrupt Time counter provides an indication of the elapsed time that the processor spends handling hardware interrupts.
Incorrect
Answers:
B: 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 consistently over 90% could point to a CPU bottleneck.
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 counter indicates the processor time spent in Privileged Mode executing non-idle threads.
E: The Percent of User Time counter 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.