Feature-Aware Task-to-Core Allocation in Embedded Multi-core Platforms via Statistical Learning

TL;DR

This paper presents a statistical learning method for task-to-core allocation in embedded multi-core systems, improving energy efficiency and thermal management by selecting influential features for environment modeling.

Contribution

It introduces a feature selection approach that considers core type, speed, temperature, and application parallelism, enhancing energy and thermal optimization in embedded platforms.

Findings

Energy consumption reduced by up to 10%

Core temperature lowered by up to 5°C

Thermal prediction accuracy improved by 6%

Abstract

Optimizing task-to-core allocation can substantially reduce power consumption in multi-core platforms without degrading user experience. However, existing approaches overlook critical factors such as parallelism, compute intensity, and heterogeneous core types. In this paper, we introduce a statistical learning approach for feature selection that identifies the most influential features-such as core type, speed, temperature, and application-level parallelism or memory intensity-for accurate environment modeling and efficient energy minimization, a critical consideration for embedded systems. Our experiments, conducted with state-of-the-art Linux governors and thermal modeling techniques, show that correlation-aware task-to-core allocation lowers energy consumption by up to 10% and reduces core temperature by up to 5C compared to random core selection. Furthermore, our compressed, bootstrapped regression model improves thermal prediction accuracy by 6% while cutting model parameters by 16%, yielding an overall mean square error reduction of 61.6% relative to existing approaches. We provided results based on superscalar Intel Core i7 12th Gen processors with 14 cores, and validated our method across a diverse set of hardware platforms and effectively balanced performance, power, and thermal demands through statistical feature evaluation.