Time-Predictable Embedded Software on Multi-Core Platforms: Analysis and Optimization

Q1 Computer Science

Foundations and Trends in Electronic Design Automation Pub Date : 2014-07-31 DOI:10.1561/1000000037

Sudipta Chattopadhyay, Abhik Roychoudhury, Jakob Rosen, P. Eles, Zebo Peng

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引用次数: 8

Abstract

Multi-core architectures have recently gained popularity due to their high-performance and low-power characteristics. Most of the modern desktop systems are now equipped with multi-core processors. Despite the wide-spread adaptation of multi-core processors in desktop systems, using such processors in embedded systems still poses several challenges. Embedded systems are often constrained by several extra-functional aspects, such as time. Therefore, providing guarantees for time-predictable execution is one of the key requirements for embedded system designers. Multi-core processors adversely affect the time-predictability due to the presence of shared resources, such as shared caches and shared buses. In this contribution, we shall first discuss the challenges imposed by multi-core architectures in designing time-predictable embedded systems. Subsequently, we shall describe, in details, a comprehensive solution to guarantee time-predictable execution on multi-core platforms. Besides, we shall also perform a discussion of different techniques to provide an overview of the state-of-the-art solutions in this topic. Through this work, we aim to provide a solid background on recent trends of research towards achieving time-predictability on multi-cores. Besides, we also highlight the limitations of the state-of-the-art and discuss future research opportunities and challenges to accomplish time-predictable execution on multi-core platforms.

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多核平台上可预测时间嵌入式软件:分析与优化

近来，多核架构因其高性能和低功耗特性而广受欢迎。大多数现代桌面系统现在都配备了多核处理器。尽管多核处理器在桌面系统中得到了广泛应用，但在嵌入式系统中使用多核处理器仍然面临一些挑战。嵌入式系统经常受到几个额外功能方面的限制，比如时间。因此，为时间可预测的执行提供保证是嵌入式系统设计人员的关键需求之一。由于存在共享资源(如共享缓存和共享总线)，多核处理器会对时间可预测性产生不利影响。在这篇文章中，我们将首先讨论多核架构在设计时间可预测嵌入式系统时所带来的挑战。随后，我们将详细描述一个保证在多核平台上执行时间可预测的综合解决方案。此外，我们还将对不同的技术进行讨论，以概述本主题中最先进的解决方案。通过这项工作，我们的目标是为实现多核时间可预测性的最新研究趋势提供坚实的背景。此外，我们还强调了最新技术的局限性，并讨论了在多核平台上实现时间可预测执行的未来研究机会和挑战。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Foundations and Trends in Electronic Design Automation ENGINEERING, ELECTRICAL & ELECTRONIC-

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期刊介绍： Foundations and Trends® in Electronic Design Automation publishes survey and tutorial articles in the following topics: - System Level Design - Behavioral Synthesis - Logic Design - Verification - Test - Physical Design - Circuit Level Design - Reconfigurable Systems - Analog Design Each issue of Foundations and Trends® in Electronic Design Automation comprises a 50-100 page monograph written by research leaders in the field.