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首页> 外文期刊>ACM Transactions on Embedded Computing Systems >A Methodology for Estimating Performance and Power Consumption of Embedded Flash File Systems
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A Methodology for Estimating Performance and Power Consumption of Embedded Flash File Systems

机译：一种估计嵌入式Flash文件系统性能和功耗的方法

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摘要

In the embedded systems domain, obtaining performance and power consumption estimations is extremely valuable in numerous cases. This is particularly true during the design stage, as designers of complex embedded systems face an increasingly large design space. Secondary storage is a well-known performance bottleneck and has also been reported as an important factor of power consumption. Flash memory is the main secondary storage media in an embedded system and exhibits specific constraints in its usage. One popular way to manage these constraints is to use dedicated Flash File Systems (FFS). In this article, we propose a methodology to estimate the performance and power consumption of applicative I/Os on an FFS-based storage system within embedded Linux. The methodology is divided into three sequential steps. In the exploration phase, the main factors of an FFS storage system impacting performance and power consumption are identified. In the modeling phase, this impact is formalized into models. Finally, in the last phase, the models are implemented in a simulator named OpenFlash. OpenFlash allows obtaining performance and power consumption estimations for an applicative workload processed by the Linux FFS storage stack on an embedded platform. The simulator is validated against real measurements and the estimation error stays below 10%.
机译：在嵌入式系统领域，在许多情况下获得性能和功耗估算非常有价值。在设计阶段尤其如此，因为复杂嵌入式系统的设计人员面临着越来越大的设计空间。辅助存储是众所周知的性能瓶颈，并且据报告也是功耗的重要因素。闪存是嵌入式系统中的主要辅助存储介质，在使用方面存在特定的限制。管理这些约束的一种流行方法是使用专用的Flash文件系统（FFS）。在本文中，我们提出一种方法来估算嵌入式Linux中基于FFS的存储系统上应用I / O的性能和功耗。该方法分为三个连续步骤。在探索阶段，确定了FFS存储系统影响性能和功耗的主要因素。在建模阶段，将这种影响形式化为模型。最后，在最后一个阶段，模型在名为OpenFlash的模拟器中实现。 OpenFlash允许为嵌入式平台上的Linux FFS存储堆栈处理的应用工作负载获取性能和功耗估算。该模拟器针对实际测量进行了验证，并且估计误差保持在10％以下。

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