Collaborative Research: SGER--Profiling and Analysis of Southern California Earthquake Center (SCEC) HPC Code for Petascale Simulations

该项目是一项探索性活动，旨在测试地震数值模拟中性能建模和优化的新专业知识和技术的应用。 它包括初步的工作，以确定未来的努力，以开发一个千万亿次版本的滞弹性波建模（AWM）代码，形成南加州地震中心的社区建模环境的一部分的可行性。 如果AWM和类似的模型可以在大规模计算资源上运行良好，例如即将推出的千万亿次系统，那么研究人员将有可能使用该模型来研究南加州和其他地方地震“最坏情况”下的地面运动，解决频率对估计建筑结构的损坏很重要。 该项目是2006年春季“Petascale Computing and the Geosciences”研讨会所产生的一系列试点项目之一。 这些试点活动都与在地球科学的不同部分使用高性能计算建模有关，其目的是确定前沿地球科学研究中使用的模拟工具如何适用于未来几年将部署的超大规模计算系统。 这些分析的结果将在2006年秋季举行的关于“Petascale计算和地球科学”的第二次讲习班上讨论。 这个SGER项目涉及来自加州大学圣地亚哥分校（UCSD）的计算机科学家之间的合作，他们专门从事数值应用程序的详细分析和优化，以及来自南加州大学（USC）和圣地亚哥州立大学（SDSU）的地球科学家他们是南加州地震中心的一部分。这项工作的更广泛的影响源于在千万亿次计算机上进行地震建模的潜力，能够比目前更准确地预测地震危险的地理分布。

This project is an exploratory activity intended to test the application of new expertise and techniques in performance modeling and optimization to the numerical simulation of earthquakes. It encompasses preliminary work to determine the feasibility of a future effort to develop a petascale version of the Anelastic Wave Modeling (AWM) code that forms part of the Southern California Earthquake Center's community modeling environment. If the AWM and similar models can be adapted to run well on large-scale computational resources, such as forthcoming petascale systems, then it will be possible for researchers to use the model to study the ground motion that would accompany "worst-case" scenarios of earthquakes in Southern California, and elsewhere, resolving frequencies that are important in estimating the damage to built structures. The project is one of a series of pilot projects spawned by a workshop on "Petascale Computing and the Geosciences" in Spring 2006. The purpose of these pilot activities, all related to the use of high-performance computational modeling in different parts of the geosciences, is to determine how the simulation tools used in leading-edge geoscience research can be adapted for the very large-scale computing systems that will be deployed in the next few years. The results of these analyses will be discussed at a second workshop on "Petascale Computing and the Geosciences" in Fall 2006. This SGER project involves collaboration between computer scientists from University of California-San Diego (UCSD), who specialize in the detailed analysis and optimization of numerical applications, and geoscientists from University of Southern California (USC) and San Diego State University (SDSU) who are part of the Southern California Earthquake Center.Broader impacts of this work stem from the potential of earthquake modeling on petascale computers to be able to predict the geographic distribution of seismic hazards more accurately than is presently possible.