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Summary: COMBINING INTRA-FRAME WITH INTER-FRAME HARDWARE ADAPTATIONS
TO SAVE ENERGY
BY
RUCHIRA SASANKA
B.Sc., University of Moratuwa, Sri Lanka, 1998
THESIS
Submitted in partial fulfillment of the requirements
for the degree of Master of Science in Computer Scienc
in the Graduate College of the
University of Illinois at Urbana-Champaign, 2002
Urbana, Illinois
Abstract
We consider the use of dynamic voltage/frequency scaling (DVS) and architectural adaptation for saving
energy for realtime multimedia applications. Previous work has considered this problem by invoking archi-
tectural and voltage/frequency adaptations at the granularity of a full frame of multimedia applications. The
proposed inter-frame adaptation algorithm exploited computation slack in each frame by using the lowest
energy configuration that still meets the application deadline.
We make two sets of contributions: (1) We explore architectural adaptation within a frame, or intra-frame
adaptations, using both old algorithms proposed in the context of non-real-time applications and new algo-
rithms. While inter-frame architectural adaptations can slow the computation, the intra-frame algorithms
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