How is CPU clock calculated?

CPU Time = I * CPI * T

1. I = number of instructions in program.
2. CPI = average cycles per instruction.
3. T = clock cycle time.

How do you calculate cycles per instruction?

1. CPU clock cycles = Instruction count x CPI.
2. CPU execution time =
3. = CPU clock cycles x Clock cycle.
4. = Instruction count x CPI x Clock cycle.
5. T =
6. I.
7. x CPI x C.

How do you calculate instructions per second?

1. Divide the number of instructions by the execution time.
2. Divide this number by 1 million to find the millions of instructions per second.
3. Alternatively, divide the number of cycles per second (CPU) by the number of cycles per instruction (CPI) and then divide by 1 million to find the MIPS.

How do you convert GHz to nanoseconds?

One Hertz is defined as one cycle per second, so a 1 Hz computer has a 10^9 ns cycle length (because nano is 10^-9). 50 Mega = 50 * 10^6, so 50MHz yields a (10^9 ns / (50 * 10^6)) = 20 ns cycle length.

What is the clock rate in Mhz of a processor having a clock cycle time of 0.25 nanoseconds?

A processor having a clock cycle time of 0.25 nsec will have a clock rate of 4000MHz.

How many instructions can a CPU process in a second?

This means that a CPU with a clock speed of 2 gigahertz (GHz) can carry out two thousand million (or two billion) cycles per second. The higher the clock speed a CPU has, the faster it can process instructions.

How many instructions per second can a computer execute?

Most people have something like a Pentium computer running Windows, or a Macintosh. A computer like this can execute approximately 100 million instructions per second. Your particular machine might be twice that fast or half that fast, but that’s the ballpark.

What determines the instruction count?

Instruction count is affected by the power of the instruction set. Different instruction sets may do different amounts of work in a single instruction.