Multilevel Simulation of Nonfunctional Properties by Piecewise Evaluation
Multilevel Simulation of Nonfunctional Properties by Piecewise Evaluation
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通过分段评估对非功能特性进行多级模拟
DOI：
10.1145/2647955
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
H.-J. Wunderlich
中科院分区：
文献类型：
--
作者：
N. Hatami;R. Baranowski;P. Prinetto;H.-J. Wunderlich
随着技术的萎缩，可靠性、脆弱性、功耗或散热等非功能属性（NFP）变得与系统功能一样重要。由于NFP经常相互影响，依赖于系统的应用和工作负载，并表现出非线性行为，NFP模拟在长时间的系统操作是计算昂贵的，如果可行的，在所有。仿真时间被划分为称为评价窗口的区间，在此区间内NFP模型被部分线性化.高速功能系统仿真是通过在不同抽象层次上并行执行模型来实现的。通过调整评估窗口的大小，实现了模拟速度和精度之间的平衡，并以负偏压温度不稳定性（NBTI）和热载流子注入（HCI）两种老化机制为例，采用分段评估技术分析了两种老化机制引起的可靠性热点。实验表明，所提出的技术产生了相当大的模拟加速精度的边际损失。
As the technology shrinks, nonfunctional properties (NFPs) such as reliability, vulnerability, power consumption, or heat dissipation become as important as system functionality. As NFPs often influence each other, depend on the application and workload of a system, and exhibit nonlinear behavior, NFP simulation over long periods of system operation is computationally expensive, if feasible at all.This article presents a piecewise evaluation method for efficient NFP simulation. Simulation time is divided into intervals calledevaluation windows, within which the NFP models are partially linearized. High-speed functional system simulation is achieved by parallel execution of models at different levels of abstraction. A trade-off between simulation speed and accuracy is met by adjusting the size of the evaluation window.As an example, the piecewise evaluation technique is applied to analyze aging caused by two mechanisms, namely Negative Bias Temperature Instability (NBTI) and Hot Carrier Injection (HCI), in order to identify reliability hotspots. Experiments show that the proposed technique yields considerable simulation speedup at a marginal loss of accuracy.