针对I/O密集型工作负载的泄漏感知直接I/O

IF 1.4 3区计算机科学 Q4 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE

IEEE Computer Architecture Letters Pub Date : 2023-07-03 DOI:10.1109/LCA.2023.3290427

Ipoom Jeong;Jiaqi Lou;Yongseok Son;Yongjoo Park;Yifan Yuan;Nam Sung Kim

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引用次数: 0

摘要

随着I/O技术的进步，对高性能的I/O数据处理提出了前所未有的要求，导致了DDIO (data Direct I/O)技术的发展。DDIO通过与任何类型的I/O设备合作，直接将所有入站I/O数据注入最后一级缓存(LLC)，从而提高了I/O处理效率。尽管如此，在某些具有多个I/O应用程序的场景中，由于LLC内部的干扰，DDIO的性能可能不太理想，从而导致系统性能下降。特别是，在本文中，我们证明了现代高性能NVMe ssd上的存储I/O很难从DDIO中受益，有时由于“泄漏DMA问题”导致共享LLC的低效使用。为了解决这个问题，我们提出了LADIO，这是一种自适应方法，通过动态控制DDIO功能和根据存储I/O数据的泄漏和局域性重新分配LLC方式来减轻应用程序间的干扰。在有严重I/O干扰的场景中，radio在保持存储密集型应用的吞吐量的同时，将网络密集型应用的吞吐量提高20%。

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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LADIO: Leakage-Aware Direct I/O for I/O-Intensive Workloads

The advancement in I/O technology has posed an unprecedented demand for high-performance processing on I/O data, leading to the development of Data Direct I/O (DDIO) technology. DDIO improves I/O processing efficiency by directly injecting all inbound I/O data into the last-level cache (LLC) in cooperation with any type of I/O device. Nonetheless, in certain scenarios with more than one I/O applications, DDIO may have sub-optimal performance caused by interference inside the LLC, resulting in the degradation of system performance. Especially, in this paper, we demonstrate that storage I/O on modern high-performance NVMe SSDs hardly benefits from DDIO, sometimes causing inefficient use of the shared LLC due to the “leaky DMA problem”. To address this problem, we propose LADIO , an adaptive approach that mitigates inter-application interference by dynamically controlling the DDIO functionality and reallocating LLC ways based on the leakage and locality of storage I/O data, respectively. In scenarios with heavy I/O interference, LADIO improves the throughput of network-intensive applications by 20% while maintaining that of storage-intensive applications.

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来源期刊

IEEE Computer Architecture Letters COMPUTER SCIENCE, HARDWARE & ARCHITECTURE-

CiteScore

4.60

自引率

4.30%

发文量

期刊介绍： IEEE Computer Architecture Letters is a rigorously peer-reviewed forum for publishing early, high-impact results in the areas of uni- and multiprocessor computer systems, computer architecture, microarchitecture, workload characterization, performance evaluation and simulation techniques, and power-aware computing. Submissions are welcomed on any topic in computer architecture, especially but not limited to: microprocessor and multiprocessor systems, microarchitecture and ILP processors, workload characterization, performance evaluation and simulation techniques, compiler-hardware and operating system-hardware interactions, interconnect architectures, memory and cache systems, power and thermal issues at the architecture level, I/O architectures and techniques, independent validation of previously published results, analysis of unsuccessful techniques, domain-specific processor architectures (e.g., embedded, graphics, network, etc.), real-time and high-availability architectures, reconfigurable systems.