Question

A CPU has a frequency of 2GHz and can execute three types of instructions:

1. Type 1 instructions require 1 cycle to finish.
2. Type 2 instructions require 2 cycles to finish.
3. Type 3 instructions require 20 cycles to finish.

How many instructions will be executed in one second?

Answer 1

A CPU with a 2GHz frequency can execute 2 billion Type 1 instructions, 1 billion Type 2 instructions, or 100 million Type 3 instructions in one second.

The actual number of instructions executed in one second will depend on the mix of instruction types being processed.

Step-by-step explanation:

To determine how many instructions a CPU with a frequency of 2GHz can execute in one second, you must consider the number of cycles each type of instruction requires.

Since the CPU operates at 2GHz, or 2 billion cycles per second, the calculation for each type of instruction is as follows:

• Type 1 instructions: Since they require 1 cycle to finish, the CPU can execute 2 billion Type 1 instructions per second.
• Type 2 instructions: Requiring 2 cycles to finish, the CPU can execute 1 billion Type 2 instructions per second
• Type 3 instructions: Needing 20 cycles to complete, the CPU can execute 100 million Type 3 instructions per second.

The actual number of instructions executed in one second will depend on the mix of instruction types being processed.