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25 Cards in this Set
- Front
- Back
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How does SPECratio relate to execution time and performance?
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What does it mean to say that SPEC normalizes execution times?
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Divide the time the reference computer ran by the time the tested computer ran to get the normalized SPECratio
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What mean must be calculated to compare SPECratios and how is it calculated?
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What are the two important properties of geometric means?
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1) The geometric mean of ratios is the same as the ratio of geometric means
2) The ratio of geometric means is equal to the geometric mean of the performance ratios |
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What is the implication of the 2nd property of geometric means?
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Study the process for the Wilcoxon test. (no question or answer)
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nothing here
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The execution time before an enhancement to a specific part of a program or computer is called what? And what is it equal to in terms of the old execution times of the parts?
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The execution time after an enhancement to a specific part of a program or computer is called what? And what is it equal to in terms of the new execution times of the parts?
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What is true about the execution times (old and new) of the unenhanced portion of a program or computer?
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What is Fraction Enhanced? And what is its formula?
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the fraction of execution time which the enhanced mode can replace with a faster time
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What is Speedup Enhanced? And what is its formula?
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the speedup gained by the enhanced mode portion of the program or computer
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What is Speedup Overall? And what is its non-amdahl's-law formula?
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the ratio of the old overall execution time with the new overall execution time(overall means segments A & B)
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What is the total execution time after enhancement? (amdahl's law part 1)
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What is the speedup overall? (amdahl's law part 2)
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What is the clock rate?
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clock cycles per second
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What is the clock cycle time and its formula in terms of clock rate?
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time between two clock pulses
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What is the CPU time equation in terms of clock cycle time?
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What is the CPU time equation in terms of the clock rate?
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What is CPI? And what is the formula for CPI in terms of the clock cycles for the program?
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Clock cycles per instruction - number of clock cycles to complete an instruction
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What is the formula for CPU time which accounts for CPI? (the simple one)
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What is the formula for the total number of CPU clock cycles?
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What is the formula for CPU time in terms of the number of clock cycles?
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In terms of the formula for total CPU clock cycles, what is the formula for CPI?
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What is the formula relative frequency of a particular instruction?
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Memorize the list at the end of the notes
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nothing here
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