Clock Cycles Calculation for a Program
What are the clock cycles required for a program with 104 instructions divided into classes A, B, C, and D?
Calculating Clock Cycles for Each Class
To find the clock cycles required for the given program, we need to calculate the number of clock cycles needed for each class A, B, C, and D, assuming each instruction takes one clock cycle to execute. The distribution of instructions is as follows:
Class A: 15% of 104 instructions = 15.6 instructions = 15.6 clock cycles
Class B: 20% of 104 instructions = 20.8 instructions = 20.8 clock cycles
Class C: 40% of 104 instructions = 41.6 instructions = 41.6 clock cycles
Class D: 25% of 104 instructions = 26 instructions = 26 clock cycles
How can we convert the clock cycles to time for each class and determine the total clock cycles required for the program?
Converting Clock Cycles to Time
To convert the clock cycles required for each class to time, we use the clock frequency assumption of 2 GHz. The conversion formula is:
Class A: 15.6 clock cycles / 2 GHz = 7.8 nanoseconds
Class B: 20.8 clock cycles / 2 GHz = 10.4 nanoseconds
Class C: 41.6 clock cycles / 2 GHz = 20.8 nanoseconds
Class D: 26 clock cycles / 2 GHz = 13 nanoseconds
The total clock cycles required for the program is the sum of the clock cycles required for each class:
15.6 + 20.8 + 41.6 + 26 = 104 clock cycles
Therefore, assuming a clock frequency of 2 GHz, the total time required to execute the program is:
104 clock cycles / 2 GHz = 52 nanoseconds