基于无前瞻自适应乐观保守同步的VLSI系统分布式仿真

D. Lungeanu, C. Shi
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引用次数: 14

摘要

本文提出了一种新的超大规模集成电路系统并行和分布式仿真协议。它在两个方面是新颖的:首先,它结合了乐观和保守同步方法,允许进程自适应以最大限度地利用并发性。其次,它不需要任何依赖于应用程序的信息,如前瞻性,在许多情况下,这些信息是未知的、零的,或者很难从硬件描述语言的设计中自动获得。所有这些特性使它非常方便和实用,将应用范围扩展到至少所有VHDL电路,包括增量周期。该协议已被实现并用于VHDL仿真。在几个大型VHDL电路(1411和14704进程之间)的实验结果显示出有希望的线性加速。我们还观察到动态同步,其中进程自动适应乐观或保守行为,紧跟或找到一个非常好的配置。该协议可能会对混合信号电路仿真产生强烈影响,其中数字部分可能是乐观的,而重状态模拟部分可能是保守的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Distributed simulation of VLSI systems via lookahead-free self-adaptive optimistic and conservative synchronization
The paper presents a novel protocol for parallel and distributed simulation of VLSI systems. It is novel in two aspects: first, it combines optimistic and conservative synchronization methods, allowing processes to self-adapt for maximal utilization of concurrency. Second, it does not require any application-dependent information like lookahead, which in many cases is unknown, zero, or difficult to automatically obtain from a design in a hardware description language. All these features make it very convenient and practical, extending the class of applications to at least all VHDL circuits, including delta cycle. The proposed protocol has been implemented and used for VHDL simulation. Experimental results on several large VHDL circuits (between 1411 and 14704 processes) have shown promising linear speedups. We also observed that the dynamic synchronization, in which processes automatically adapt to optimistic or conservative behavior, follows closely or finds a very good configuration. This protocol may have a strong impact for mixed-signal circuit simulation, where digital parts may be optimistic and heavy-state analog parts, conservative.
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