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Published Articles >> Table of Contents >> Abstract
11th IEEE International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunications Systems (MASCOTS'03)
p. 46
Using User Interface Event Information in Dynamic Voltage Scaling Algorithms
Jacob R. Lorch, Microsoft Research
Alan Jay Smith, University of California, Berkeley
Full Article Text:
  
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/MASCOT.2003.1240641
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| Abstract |
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Increasingly, mobile computers use dynamic voltage
scaling (DVS) to reduce CPU voltage and speed and thereby
increase battery life. To determine how to change voltage
and speed when responding to user interface events, we analyze
traces of real user workloads. We evaluate a new
heuristic for inferring when user interface tasks complete
and find it is more efficient and nearly as effective as other
approaches. We compare DVS algorithms and find that for a
given performance level, the PACE algorithm uses the least
energy and the Stepped algorithm uses the second least.
We find that different types of user interface event (mouse
movements, mouse clicks, and keystrokes) trigger tasks with
significantly different CPU use, suggesting one should use
different speeds for different event types. We also find differences
in CPU use between categories of the same event type,
e.g., between pressing spacebar and pressing enter, and between
events of different applications. Thus, it is better to
predict task CPU use based solely on tasks of the same category
and application. However, energy savings from such
improved predictions are small.
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 Additional Information
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Index Terms- Workload characterization and generation,
modeling and simulation, response time, dynamic voltage
scaling, energy management, power management
Citation:
Jacob R. Lorch, Alan Jay Smith,
"Using User Interface Event Information in Dynamic Voltage Scaling Algorithms,"
mascots,
p. 46,
11th IEEE International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunications Systems (MASCOTS'03),
2003
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