ECEn 424 Set #6 - ECEn424HomeworkSet#6...

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ECEn 424 Homework Set #6 Submit your (hardcopy) solutions to the problems below in the homework box by 5:00 PM on the assigned date. Problem 424­3: In this problem, you will explore some of the challenges of getting reliable performance measures for the loop­ based vector code examples discussed in the book. 1. Part 1. Write a paragraph about the challenges that arise when using the time stamp counter in current x86 processors. Look at the "time stamp counter" Wikipedia entry to get some insight here. (Feel free to consult additional sources.) Be sure to say something about repeatability, and specific problems arising if the measurement interval is too short or too long. 2. Part 2. Analyze the source code in this tar file that is used to create a "getcpe" executable that can produce CPE measures for loop­based code. Write a paragraph describing how this code addresses the problems you identified above. Be sure to identify both strengths and weaknesses in the overall approach taken.
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  • Winter '17
  • James Archibald
  • key parameters, vector code examples, reliable performance measures, executable named getcpe., GCC optimization levels, spice machine. Note

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