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FC-AMAT: factor-based C-AMAT analysis in memory system measurement

机译：FC-AMAT：内存系统测量中基于因子的C-AMAT分析

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摘要

The “memory wall” problem has necessitated the introduction of more accurate memory metrics. C-AMAT, an extension of AMAT that considers memory access concurrency, can evaluate the performance of modern memory systems more accurately and comprehensively. However, compared to AMAT, calculating C-AMAT means additional complexity and more hardware resources, which incurs high overhead for this metric. In this paper, we propose FC-AMAT, an analysis model based on C-AMAT. We first explore the numerical relations between factors’ C-AMAT and overall C-AMAT, then try to use factor’s-first (changed factor or leading factor) C-AMAT to evaluate effects of changes applied to a memory system, which can not only reduce measurement overhead, but also guarantee acceptable evaluation accuracy through a rigorous check. Furthermore, we provide the method to determine the leading factor of a memory system. Simulations with varied configurations are conducted to study the numerical relations between factors’ C-AMAT and overall C-AMAT, as well as to evaluate the effects of FC-AMAT. Experimental results show that (1) parameters of factors’ C-AMAT have different influence degrees on overall C-AMAT, (2) the leading factor of a memory system remains unchanged across various configurations and (3) using factor’s C-AMAT as the evaluation metric reduces the hardware overhead for measurement, including detecting logic and storage cost, which demonstrates the effectiveness of FC-AMAT.
机译：“记忆墙”问题需要引入更准确的内存指标。 C-AMAT是考虑内存访问并发性的AMAT的延伸，可以更准确，全面地评估现代内存系统的性能。然而，与AMAT相比，计算C-AMAT是指额外的复杂性和更多硬件资源，这对于该度量突出了高开销。在本文中，我们提出了基于C-Amat的分析模型的FC-AMAT。我们首先探讨因子C-AMAT和整体C-AMAT之间的数值关系，然后尝试使用因子 - 第一（改变因子或前导因子）C-AMAT来评估应用于内存系统的变化的影响，这不仅可以减少测量开销，也可以通过严格的检查保证可接受的评估准确性。此外，我们提供了确定存储器系统的前导因素的方法。进行了各种配置的模拟，以研究因素C-AMAT和整体C-AMAT之间的数值关系，以及评估FC-AMAT的影响。实验结果表明，因素的C-Amat参数在整体C-Amat上具有不同的影响程度，（2）存储系统的前导因素在各种配置中保持不变，并且使用因子的C-AMAT作为（3）评估度量降低了测量的硬件开销，包括检测逻辑和存储成本，这证明了FC-AMAT的有效性。

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