Question

Question 1: Consider two different implementations, M1 and M2, of the same instruction set. There are four

classes of instructions (A, B, C, and D) in the instruction set.

M1 has a clock rate of 500 MHz while M2’s clock rate is 750 MHz. The average number of cycles for each instruction class of M1 and M2 are shown in the following table:

Class	CPI for this class on M1	CPI for this class on M2
A	1	2
B	2	2
C	3	4
D	4	4

1. A) Assume that peak performance is defined as the fastest rate that a machine can execute an instruction sequence chosen to maximize that rate. What are the peak performances of M1 and M2 as instructions per second?

2. B) If the number of instructions executed in a certain program is divided equally among the classes of instructions:
   1. How much faster is M2 than M1?
   2. At what clock rate would M1 have the same performance as the 750-MHz version of M2?

Answer 1