Fast and accurate simulation environment (fase) for high-performance computing systems and applications
Fast and accurate simulation environment (fase) for high-performance computing systems and applications(2008)
摘要
As systems of computers become more complex in terms of their architecture, interconnect, and heterogeneity, the optimum configuration and use of these machines becomes a major challenge. To reduce the penalties caused by poorly configured systems, simulation is often used to predict the performance of key applications to be executed on the new systems. Simulation provides the capability to observe component and system characteristics (e.g., performance and power) in order to make vital design decisions. However, simulating high-fidelity models can be very time consuming and even prohibitive when evaluating large-scale systems. The Fast and Accurate Simulation Environment (FASE) framework seeks to support large-scale system simulation by using high-fidelity models to capture the behavior of only the performance-critical components while employing abstraction techniques to capture the effects of those components with little impact on the system. To achieve this balance of accuracy and simulation speed, FASE provides a methodology and associated toolset to evaluate numerous architectural options. This approach allows users to make system design decisions based on quantifiable demands of their key applications rather than using manual analysis which can be error prone and impractical for large systems. The framework accomplishes this evaluation through a novel approach of combining discrete-event simulation with an application characterization scheme in order to remove unnecessary details while focusing on components critical to the performance of the application. In addition, FASE is extended to support in-depth availability analyses and quick evaluations of data-intensive applications. In this document, we present the methodology and techniques behind FASE and include several case studies validating systems constructed using various applications and interconnects. The studies show that FASE produces results with acceptable accuracy (i.e., maximum error of 23.3% and under 6% in most cases) when predicting the performance of complex applications executing on HPC systems. Furthermore, when using FASE to analyze data-intensive applications, the framework achieves over 1500× speedup with less than 1% error when compared to the traditional, function-level modeling approach.
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关键词
accurate simulation environment,configured system,HPC system,key application,data-intensive application,discrete-event simulation,high-performance computing system,large system,simulation speed,new system,large-scale system simulation,large-scale system
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