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Real-Time Program Phase Change Detection and Prediction

12 Jul
Thursday, 07/12/2018 1:30pm to 3:30pm
Computer Science Building, Room 151
Ph.D. Thesis Defense

It is well-known that programs tend to have multiple phases in their execution. Because phases have impact on micro-architectural features such as caches and branch predictors, they are relevant to program performance and energy consumption. They are also relevant to detecting whether a program is executing as expected or is encountering unusual or exceptional conditions, a software engineering and program monitoring concern.

We present methods for real-time phase change detection and phase prediction in Java, C, (etc.,) and Python programs. After applying a training protocol to a program of interest, our methods can detect and predict phase at run time for that program with good precision and recall (compared with a "ground truth" definition of phases) and with small performance impact. Furthermore, for concrete applications, we explore run-time energy-efficient clock frequency adjustment for statically compiled executables.

Advisor: J. Eliot B. Moss