Computers and Technology, 21.02.2020 20:46 jonroberts1587

A new compiler is developed that uses only 4.0E8 instructions and has an average CPI of 1.2. What is the speedup of using this new compiler versus using compiler A or B on the original processor

Answers: 3

Show answers

Answers

Compilers can have a profound impact on the performance of an application. Assume that for a program, compiler A results in a dynamic instruction count of 1.0E9 and has an execution time of 1.5 s, while compiler B results in a dynamic instruction count of 1.2E9 and an execution time of 1.4 s.

a) Find the average CPI for each program given that the processor has a clock rate is 8000 MHZ

b) A new compiler is developed that uses only 4.0E8 instructions and has an average CPI of 1.2. What is the speedup of using this new compiler versus using compiler A or B on the original processor?

the average CPI (cycles per instruction) for program A = 12

the average CPI (cycles per instruction) for program B = 9.33

the speedup of using the new compiler versus compiler A = = 0.04

the speedup of using the new compiler versus compiler B = 0.043

Explanation:

Given that:

For compiler A:

number of dynamic instruction count = 1.0 × 10⁹

execution time = 1.5 s

For compiler B:

number of dynamic instruction count = 1.2 × 10⁹

execution time = 1.4 s

Find the average CPI for each program given that the processor has a clock rate is 8000 MHZ

Clock rate = 8000 MHZ

Cpu count time = $\frac{1}{8000}*10^{-6$ = 0.125 × 10⁻⁹ ns

= 0.125 × 10⁻⁹ ns

So the average CPI (cycles per instruction) for program A can be calculated as:

1.5 s = 1.0×10⁹ × × 0.125 × 1.0⁻⁹ ns

1.5 s = (0.125 ns) ( $10^{(9+(-9)}$ )

= $\frac{1.5}{0.125}$

= 12

the average CPI (cycles per instruction) for program B can be calculated as:

1.4 s = 1.2×10⁹ × × 0.125 × 10⁻⁹ ns

1.4 s = (0.15 ns) ( $10^{(9+(-9)}$ )

= $\frac{1.4}{0.15}$

= 9.33

Given that:

Number of instruction of new compiler = 4.0× 10⁸

Average CPI = 1.2

Execution time for the new compiler = Number of instruction of new

compiler × Average CPI × Cpu count

time

Execution time for the new compiler = 4.0 × 10⁸ × 1.2 × 0.125 × 10⁻⁹

= 0.6 ( $10^{8+(-9)}$ )

= 0.6 × 10⁻¹

= 0.06 seconds

Therefore,

the speedup of using the new compiler versus compiler A = $\frac{0.06}{1.5}$

= 0.04

the speedup of using the new compiler versus compiler B = $\frac{0.06}{1.4}$

= 0.043

Answer from: Quest

There is a little paper clip at the bottom of your screen and then you click then you pick the picture you want

Answer from: Quest

Hdi4nfnfuhdjdurjfjc7fjrnckf snuck fhfjfkfmfjfk4jrhr

Another question on Computers and Technology

Computers and Technology, 22.06.2019 08:10

Technician a says that if a valve is open when a piston rises to the very top of a cylinder, the piston may actually strike the valve head and cause serious engine damage. technician b says if the camshaft is located in the engine block, then the engine is called an overhead valve engine, ohv engine, or an in-block camshaft. who is right? a. b only b. both a and b c. a only d. neither a nor b

Answers: 3

Answer

Computers and Technology, 22.06.2019 11:00

in 2007, floridians died in alcohol-related collisions.a. 501b. 1,051c. 5,015d. 10,839

Answers: 1

Answer

Computers and Technology, 22.06.2019 17:30

Working on this program in python 3.7: a year in the modern gregorian calendar consists of 365 days. in reality, the earth takes longer to rotate around the sun. to account for the difference in time, every 4 years, a leap year takes place. a leap year is when a year has 366 days: an extra day, february 29th. the requirements for a given year to be a leap year are: 1) the year must be divisible by 42) if the year is a century year (1700, 1800, the year must be evenly divisible by 400some example leap years are 1600, 1712, and 2016.write a program that takes in a year and determines whether that year is a leap year.ex: if the input is 1712, the output is: 1712 is a leap year. ex: if the input is 1913, the output is: 1913 is not a leap year. your program must define and call the function isleapyear(useryear). the function should return true if the input year is a leap year and false otherwise.

Answers: 1

Answer

Computers and Technology, 24.06.2019 03:30

The footer area of a web page generally houses which website feature? terms of use web page content business name or title menu headings

Answers: 1

Answer

You know the right answer?

A new compiler is developed that uses only 4.0E8 instructions and has an average CPI of 1.2. What is...

Questions