Chap 2: Metric of Performance

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Presentation transcript:

Chap 2: Metric of Performance Dr. Yeffry Handoko Putra Chap 2: Metric of Performance

What is Performance Metric? The things are interesting and useful to determine performance The basic in Computer System: A count of how many times an event occurs The duration of some time interval The size of some parameter : " I

Principles of Good Performance Metric All Performance Metric satisfy all the absolute requirement Linearity: Double the metric will double the performance Reliability: Accurate and concistence. e.g WIPS (reliable), MIPS (unreliable) Repeatability: same value on repeating measurement Easiness of Measurement: correct metric easy to measure Consistency: same in different configuration Independence : Not influenced by others

Processor and System Performance Metric Clock rate (MHz) , nonlinear and unreliable MIPS (millions of intructions executed per second) easy to measure, repeatable, independent but not in other characteristic. Case Branch Instruction MFLOPS (million of floating point operation executed per second) case: cray vector computer syst. Unreliable, inconsistent

Processor and System Performance Metric SPEC: System Performance Evaluation Cooperative Standardized Methodology: Measure the time required to execute Divide the time with time standard (normalization) Average with geometric mean QUIPS (Quality of the Solution) Linier, repeatable, Independent Execution Time Mean and End Metric

Other Performance Metric Response Time Throughput Speedup and relative change

Contoh: Hitung metrik speedup dan perubahan relatif mengacu ke sistem 1

Contoh: Hitung metrik speedup dan perubahan relatif mengacu ke sistem 1

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