A Dual-Criticality Memory Controller (DCmc): Proposal and Evaluation of a Space Case Study

J. Jalle, E. Quiñones, J. Abella, L. Fossati, Marco Zulianello, F. Cazorla
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引用次数: 59

Abstract

Multicore Dual-Criticality systems comprise two types of applications, each with a different criticality level. In the space domain these types are referred as payload and control applications, which have high-performance and real time requirements respectively. In order to control the interaction (contention) among payload and control applications in the access to the main memory, reaching the goals of high bandwidth for the former and guaranteed timing bounds for the latter, we propose a Dual-Criticality memory controller (DCmc). DCmc virtually divides memory banks into real-time and high-performance banks, deploying a different request scheduler policy to each bank type, which facilitates achieving both goals. Our evaluation with a multicore cycle-accurate simulator and a real space case study shows that DCmc enables deriving tight WCET estimates, regardless of the co-running payload applications, hence effectively isolating the effect of contention in the access to memory. DCmc also enables payload applications exploiting memory locality, which is needed for high performance.
双临界存储器控制器(DCmc):空间案例研究的建议与评估
多核双临界系统包括两种类型的应用程序,每种应用程序都具有不同的临界级别。在空间领域,这些类型分别被称为有效载荷和控制应用,它们分别具有高性能和实时性要求。为了控制负载和控制应用程序在访问主存时的交互(争用),达到负载和控制应用程序的高带宽和控制应用程序的保证时间界限的目标,我们提出了一种双临界内存控制器(DCmc)。DCmc实际上将内存库划分为实时和高性能存储库,为每种存储库类型部署不同的请求调度程序策略,这有助于实现这两个目标。我们使用多核周期精确模拟器和真实空间案例研究进行的评估表明,无论共同运行的负载应用程序如何,DCmc都可以获得严格的WCET估计,因此有效地隔离了内存访问中的争用影响。DCmc还支持有效负载应用程序利用内存局部性,这是高性能所需要的。
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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