TR-2014-02
CoAdapt: Predictable Behavior for Accuracy-Aware Applications Running on Power-Aware Systems
Henry Hoffmann. 19 March, 2014.
Communicated by Henry Hoffmann.
Obsolete: Yes (updated 05/29/14)
Abstract
We present CoAdapt, a runtime that coordinates
accuracy-aware applications, which expose accuracy/performance
tradeoffs, with power-aware systems, which manage power/performance
tradeoffs. This is a challenging problem because decisions
made at one level affect, and often counteract, decisions
made at the other, leading to unpredictable behavior. Prior approaches
have coordinated application and system, but provide a
guarantee in only a single dimension (i.e., just one of performance,
power, or accuracy). In contrast, CoAdapt addresses the full
performance/power/accuracy problem space with an adaptive
runtime control system that guarantees behavior in any two
of these dimensions, while optimizing the third. We implement
CoAdapt on a Linux/x86 platform and show it predictably
stabilizes to the desired behavior, adapts to phases in application
workload, and supports dynamic changes to behavioral goals.
Original Document
The original document is available in PDF (uploaded 19 March, 2014 by
Henry Hoffmann).
