Computer Architecture: Performance Metrics

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Questions and Answers

What is the formula to calculate the relative performance of two systems, X and Y?

  • n = Exec_Timey / Exec_Timex (correct)
  • n = Exec_Timex * Exec_Timey
  • n = Speedx * Speedy
  • n = Speedx / Speedy

If a system A takes 5 seconds to execute a program and system B takes 10 seconds, how much faster is system A?

  • 10 times faster
  • 1 times faster
  • 0.5 times faster
  • 2 times faster (correct)

What is the unit of measurement for Speed?

  • Seconds
  • Instructions per second (correct)
  • Clocks per instruction
  • None of the above

If a system X has a speed of 5000 and system Y has a speed of 1000, how much faster is system X?

<p>5 times faster (A)</p> Signup and view all the answers

What is the correct formula to calculate the speed of a system using Clocks Per Instruction (CPI)?

<p>Speed = 1 / (CPI * Clock) (B)</p> Signup and view all the answers

If a system A has an execution time of 2 seconds and system B has an execution time of 4 seconds, which system is faster?

<p>System A (B)</p> Signup and view all the answers

If Computer A takes 1000 seconds to execute a program and Computer B takes 500 seconds, how many times faster is Computer B?

<p>2.0 (B)</p> Signup and view all the answers

What is the primary factor that affects the performance of a computer?

<p>Clock Rate (D)</p> Signup and view all the answers

A benchmark is typically used to measure the performance of a computer under what type of workload?

<p>Typical workload (A)</p> Signup and view all the answers

What is the purpose of measuring the execution time of a program on a computer?

<p>To compare the performance of different computers (B)</p> Signup and view all the answers

What is the result of decreasing the clock period of a computer?

<p>Improved performance (B)</p> Signup and view all the answers

What is the primary factor that affects the performance of a system?

<p>Clock rate (D)</p> Signup and view all the answers

A computer has a clock rate of 2 GHz and a clock period of 0.5 nanoseconds. What is the relationship between these two values?

<p>The clock rate is the reciprocal of the clock period (B)</p> Signup and view all the answers

Which of the following design efforts would NOT improve the performance of a computer?

<p>Increase the CPI (C)</p> Signup and view all the answers

What is the purpose of a benchmark in computer performance measurement?

<p>To determine the typical workload of a system (A)</p> Signup and view all the answers

If a system takes 10 seconds to execute a program and another system takes 5 seconds to execute the same program, how much faster is the second system?

<p>2 times (B)</p> Signup and view all the answers

What is the unit of measurement for Clock Period?

<p>Nanoseconds (D)</p> Signup and view all the answers

If a system has a speed of 2000, how much faster is it than a system with a speed of 1000?

<p>2 times (B)</p> Signup and view all the answers

What is the effect of increasing the clock rate on the performance of a computer?

<p>It increases the performance (B)</p> Signup and view all the answers

What do benchmarks typically represent in terms of workload?

<p>Typical workload (D)</p> Signup and view all the answers

What is the relationship between execution time and speed of a computer?

<p>They are inversely proportional (B)</p> Signup and view all the answers

What is the direct proportional factor to the performance of a computer?

<p>Clock Rate (C)</p> Signup and view all the answers

What is the purpose of a benchmark in computer performance measurement?

<p>To form a typical workload (A)</p> Signup and view all the answers

What is the inverse proportional factor to the performance of a computer?

<p>Execution Time (A)</p> Signup and view all the answers

What is the result of increasing the clock rate of a computer?

<p>Decrease in the execution time (C)</p> Signup and view all the answers

What is the relationship between the clock rate and the clock period of a computer?

<p>They are inversely proportional (D)</p> Signup and view all the answers

What is the unit of measurement for the clock period?

<p>nanoseconds (C)</p> Signup and view all the answers

If a system takes 20 seconds to execute a program and another system takes 10 seconds to execute the same program, how many times faster is the second system?

<p>2 (B)</p> Signup and view all the answers

What is the effect of decreasing the clock period on the performance of a computer?

<p>It increases the performance (C)</p> Signup and view all the answers

What is the purpose of a benchmark in computer performance measurement?

<p>To form a typical workload (B)</p> Signup and view all the answers

What design effort can improve the performance of a computer?

<p>Increase the clock rate (C)</p> Signup and view all the answers

What is the correct formula to calculate the speed of a system?

<p>Speed = 1 / Execution Time (C)</p> Signup and view all the answers

What is the effect of decreasing the clock period on the clock rate of a computer?

<p>It increases the clock rate (B)</p> Signup and view all the answers

What is the primary purpose of measuring the execution time of a program on a computer?

<p>To compare the performance of different computers (A)</p> Signup and view all the answers

What is the relationship between the clock rate and the clock period of a computer?

<p>The clock rate is inversely proportional to the clock period (B)</p> Signup and view all the answers

What is the effect of increasing the clock rate on the execution time of a program?

<p>It decreases the execution time (D)</p> Signup and view all the answers

What is the purpose of a benchmark in computer performance measurement?

<p>To compare the performance of different computers (D)</p> Signup and view all the answers

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