基于源节流的公平性:多核存储系统的可配置高性能公平性基板

IF 2 4区 计算机科学 Q2 COMPUTER SCIENCE, THEORY & METHODS
Eiman Ebrahimi, Chang Joo Lee, O. Mutlu, Y. Patt
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引用次数: 21

摘要

芯片多处理器(cmp)中的内核共享多个内存子系统资源。如果资源共享是不公平的,一些应用程序可能会被严重延迟,而另一些应用程序则会被不公平地优先考虑。先前的研究提出了针对每种资源的单独公平机制。这种基于资源的公平机制在每个资源中独立实现,可能会产生相互矛盾的决策,导致公平性低下和性能损失。因此,需要一种在整个共享内存系统中提供公平性的协调机制。本文提出了一种在整个共享内存系统中提供公平性的新方法,从而消除了为每个资源开发公平性机制的必要性和复杂性。我们的技术,公平通过源节流(FST),估计不公平在整个内存系统。如果不公平高于系统软件设置的阈值,FST通过限制它们创建的请求的数量和频率来减少导致不公平的内核。因此,我们基于源的公平性控制确保公平性决策在整个内存系统中串联做出。FST强制线程优先级/权重,并使系统软件在内存系统中强制不同的公平性目标。我们的评估表明,与在共享缓存和内存控制器中实现最先进的公平机制的三个系统相比,FST提供了最好的系统公平性和性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fairness via Source Throttling: A Configurable and High-Performance Fairness Substrate for Multicore Memory Systems
Cores in chip-multiprocessors (CMPs) share multiple memory subsystem resources. If resource sharing is unfair, some applications can be delayed significantly while others are unfairly prioritized. Previous research proposed separate fairness mechanisms for each resource. Such resource-based fairness mechanisms implemented independently in each resource can make contradictory decisions, leading to low fairness and performance loss. Therefore, a coordinated mechanism that provides fairness in the entire shared memory system is desirable. This article proposes a new approach that provides fairness in the entire shared memory system, thereby eliminating the need for and complexity of developing fairness mechanisms for each resource. Our technique, Fairness via Source Throttling (FST), estimates unfairness in the entire memory system. If unfairness is above a system-software-set threshold, FST throttles down cores causing unfairness by limiting the number of requests they create and the frequency at which they do. As such, our source-based fairness control ensures fairness decisions are made in tandem in the entire memory system. FST enforces thread priorities/weights, and enables system-software to enforce different fairness objectives in the memory system. Our evaluations show that FST provides the best system fairness and performance compared to three systems with state-of-the-art fairness mechanisms implemented in both shared caches and memory controllers.
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来源期刊
ACM Transactions on Computer Systems
ACM Transactions on Computer Systems 工程技术-计算机:理论方法
CiteScore
4.00
自引率
0.00%
发文量
7
审稿时长
1 months
期刊介绍: ACM Transactions on Computer Systems (TOCS) presents research and development results on the design, implementation, analysis, evaluation, and use of computer systems and systems software. The term "computer systems" is interpreted broadly and includes operating systems, systems architecture and hardware, distributed systems, optimizing compilers, and the interaction between systems and computer networks. Articles appearing in TOCS will tend either to present new techniques and concepts, or to report on experiences and experiments with actual systems. Insights useful to system designers, builders, and users will be emphasized. TOCS publishes research and technical papers, both short and long. It includes technical correspondence to permit commentary on technical topics and on previously published papers.
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