lec07_floating_point

lec07_floating_point - Lecture 7 Midterm Review and...

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Lecture 7: Midterm Review and Floating Point Computer Architecture CSC 205
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Midterm Format ° Open book, open note Know the material well enough so that you do not need your book or notes ° Bring calculator and scratch paper. ° About five problems (with multiple parts) Short answers Explanations Problem solving ° Based on lecture notes, book, and homeworks (Lectures 1 - 6, Chapters 1 - 4, Homeworks 1&2). No division or floating point, until midterm. ° 75 minutes for midterm, in class on February 21st. . ° Try sample test and 1998 midterm on course homepage
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Chapter 1 : Computer Abstractions and Technology ° Instruction Set Architecture and Machine Organization ° Levels of abstraction Interface (outside view) implementation (inside view) ° Current trends in capacity and performance processor, memory, and I/O ° Predicting improvements in performance Processor performance improves by 50% per year How much faster will the processor be in 5 years ° Types of computer components datapath, control, memory, input, and output
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Chapter 2: The Role of Performance ° Execution time (seconds) vs. Performance (tasks per second) ° X is n times faster than Y" means performance(X) execution_time(Y) n = ----------------------- = ------------------------- performance(Y) execution_time(X) ° Calculating CPU execution time CPU time = Instruction count x CPI x clock cycle time CPU time = Instruction count x CPI / clock rate What affects each of the above factors? ° Computer Benchmarks (SPEC Benchmarks) ° Summarizing performance: arithmetic mean vs. geometric mean ° Poor performance metrics: MIPS and MFLOPS ° Amdahl’s law: Speedup = ExTime old ExTime new = 1 (1 - Fraction enhanced ) + Fraction enhanced Speedup enhanced
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Chapter 3: Instruction Set Architecture ° The MIPS architecture registers and memory addressing instruction formats and fields instructions supported
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lec07_floating_point - Lecture 7 Midterm Review and...

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