DS 642 Lecture 3: Parallel Computing Applications
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Questions and Answers

What is the main purpose of pipelining in computing?

  • To increase the time it takes to complete a task
  • To slow down the overall process of executing tasks
  • To reduce the number of tasks completed in a given time frame
  • To decrease latency by executing multiple tasks simultaneously (correct)

    • In the Laundry example given by Dave Patterson, what is the total time taken for sequential execution of 4 loads of laundry?

  • 2.5 hours
  • 6 hours (correct)
  • 3 hours
  • 8 hours

    • What is the total time taken for pipelined execution of 4 loads of laundry in Dave Patterson's Laundry example?

  • 5 hours
  • 7 hours
  • 3.5 hours (correct)
  • 2 hours

    • How does pipelining affect the bandwidth in the Laundry example?

    <p>Increases bandwidth</p> Signup and view all the answers

    What is the main difference between sequential execution and pipelined execution in Dave Patterson's Laundry example?

    <p>Pipelined execution allows simultaneous task processing</p> Signup and view all the answers

    How does pipelining contribute to optimization in matrix multiplication according to the lecture?

    <p>Enhances parallelism and reduces execution time</p> Signup and view all the answers

    In Dave Patterson's Laundry example, what is the total time taken for sequential execution of 4 loads of laundry?

    <p>6 hours</p> Signup and view all the answers

    What is the total time taken for pipelined execution of 4 loads of laundry in Dave Patterson's Laundry example?

    <p>3.5 hours</p> Signup and view all the answers

    How does the bandwidth change with pipelining in Dave Patterson's Laundry example?

    <p>Increases from 4/6 loads per hour to 4/3.5 loads per hour</p> Signup and view all the answers

    What is the latency for wash, dry, and fold tasks in Dave Patterson's Laundry example?

    <p>30 min, 40 min, 20 min</p> Signup and view all the answers

    What does Instruction Level Parallelism (ILP) refer to in the context of parallel computing discussed in the lecture?

    <p>Parallelism within a single processor achieved by executing multiple instructions at the same time</p> Signup and view all the answers

    What is the purpose of SIMD units in parallel computing based on the content provided?

    <p>To perform the same operation on multiple data elements simultaneously</p> Signup and view all the answers

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