TR-2014-12

CoAdapt: Predictable Behavior for Accuracy-Aware Applications Running on Power-Aware Systems

Henry Hoffmann. 29 May, 2014.
Communicated by Henry Hoffmann.

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 29 May, 2014 by Henry Hoffmann).