多媒体系统中存储相位的检测与利用

H. Tajik, Bryan Donyanavard, N. Dutt
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引用次数: 7

摘要

许多多媒体应用程序表现出相位行为。应用程序的相位行为研究主要集中在代码执行上。但是,应用程序内存使用的时间变化可能会偏离其程序行为,从而提供了利用这些内存阶段来更有效地使用片上内存资源的机会。在这项工作中,我们定义了内存阶段,而不是程序阶段,并说明了它们之间的潜在差异。我们提出了一种轻量级在线记忆相位检测机制。此外,我们通过在多核平台上部署这些技术来共享分布式片上Scratchpad memory (spm)来展示它们的实用性。在内存阶段收集的信息用于确定多核平台中不同内存页的优先级,而无需事先了解运行的应用程序。通过利用内存阶段行为,我们在一组多媒体应用程序上实现了高达45%的内存访问延迟改进。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On detecting and using memory phases in multimedia systems
Many multimedia applications exhibit a phasic behavior. Phasic behavior of applications has been studied primarily focused on code execution. However, temporal variation in an application's memory usage can deviate from its program behavior, providing opportunities to exploit these memory phases to enable more efficient use of on-chip memory resources. In this work, we define memory phases as opposed to program phases, and illustrate the potential disparity between them. We propose mechanisms for light-weight online memory-phase detection. Additionally, we demonstrate their utility by deploying these techniques for sharing distributed on-chip Scratchpad Memories (SPMs) in multi-core platforms. The information gathered during memory phases are used to prioritize different memory pages in a multi-core platform without having any prior knowledge about running applications. By exploiting memory-phasic behavior, we achieved up to 45% memory access latency improvement on a set of multimedia applications.
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