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CDA3101-F11-HW5-FINALCOPY

# CDA3101-F11-HW5-FINALCOPY - CDA 3101 Organization of...

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CDA 3101 Organization of Computer Systems Fall 2011 Homework #5 (40 points total) Assigned: Wednesday 01 November 2011 Due: at the start of lecture on Friday 18 November 2011 This assignment has three parts. Please start each part on a new page . Print NEATLY and put your name and section number on each page . Show your work. Please scan or Xerox- copy your homework before turning it in, and staple all pages together with a metal staple. Part I. Pipelining 1. Short Answer (8 pts, 2 pt per item) Define the following (one sentence): 1.1. Pipeline (computing) 1.2. Forwarding (in a pipeline) 1.3. Virtual Memory 1.4. Cache 2. Simple Problems (12 pts, 4 pt per problem, show all work for full credit ): 2.1. If a pipeline with N stages (one cycle per stage) processes a program P consisting of M instructions without stalls or exceptions, how many cycles are required to process P ? 2.2. If a pipeline with N stages (one cycle per stage) processes program P , which has M instructions, of which a fraction 0 < p < 1 throws an exception that causes the entire pipe to be flushed, how many cycles are required to process P ?

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