Question: A RISC machine having instruction mix as given in the below table. Type of Opcode Frequency of occurrence Cycles % of CPU time utilized ALU

A RISC machine having instruction mix as given in the below table.

Type of Opcode

Frequency of occurrence

Cycles

% of CPU time utilized

ALU

50%

1

23

Branch

20%

3

18

Store

10%

3

14

Load

20%

5

45

a. What is the CPI of the machine?

b. What is the time taken for executing 100 instructions when the clock frequency is 1GHZ?

c. What is the MIPS rate?

d. If the Load instruction is enhanced from 5 to 3 cycles. What is the Speed up when Amdahl law is applied?

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