Which of the following counters is used to measure the multiprocessor systems only?

A.
Percent Total Processor Time

B.
Percent Processor Time

C.
Percent of Interrupt Time

D.
Interrupts Per Second

Explanation:
Percent Total Processor Time measures the multiprocessor systems only, this counter is used the same way as that for a single CPU counter.
Incorrect Answers:
B: Percent Processor Time measures the period that a processor is busy executing a non-idle thread. Idle threads are assigned to each processor to consume non-productive clock cycles.
C: Percent of Interrupt Time measures the percentage of elapsed time that the processor spends handling hardware interrupts.
D: Interrupts Per Second measures the number of device interrupts the processor is currently experiencing.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 335, 336