| 二维浅水波并行模式的伴随 |
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| 引用本文： | 曹小林,宋君强,孙安香. 二维浅水波并行模式的伴随[J]. 国防科技大学学报, 2003, 25(2): 41-45 |
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| 作者姓名： | 曹小林 宋君强 孙安香 |
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| 作者单位： | 1. 北京应用物理与计算数学研究所,北京,100088
2. 国防科技大学计算机学院,湖南,长沙,410073 |
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| 基金项目： | 国家部委基金项目资助(2001BA607B02) |
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| 摘 要： | 以二维浅水波为例,详细探讨如何开发并行模式的切线性模式和伴随模式。切线性模式的并行机制和原始模式一致,而伴随模式不同。三个模式采用一致的数据剖分方法可提高并行效率。在集群并行计算机系统上采用一维数据剖分,切线性模式的通信量与原始模式相当,而计算量几乎是原始模式的2倍;伴随模式的通信量大约是原始模式的2倍,而计算量几乎是原始模式的3倍。在三个模式中,切线性模式的加速比最大。
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| 关 键 词： | 并行模式 切线性模式 伴随模式 计算量 通信量 |
| 文章编号： | 1001-2486(2003)02-0041-05 |
| 收稿时间： | 2002-09-29 |
| 修稿时间： | 2002-09-29 |
Adjoint Model of 2-D Parallel Shallow Water Model |
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| CAO Xiaolin,SONG Junqiang and SUN Anxiang. Adjoint Model of 2-D Parallel Shallow Water Model[J]. Journal of National University of Defense Technology, 2003, 25(2): 41-45 |
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| Authors: | CAO Xiaolin SONG Junqiang SUN Anxiang |
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| Affiliation: | 1.Institute of Applied Physics and Computational Mathematics,Beijing 100083,China;2.College of Computer,National Univ. of Defense Technology,Changsha 410073,China;2.College of Computer,National Univ. of Defense Technology,Changsha 410073,China |
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| Abstract: | This paper discusses how to develop adjoint model(ADM) and tangent linear model(TLM) of the parallel model based on shallow water equation.The parallel strategy of TLM is the same as the original parallel model.Parallel strategy of ADM is different.The three adopt uniform domain decomposition in order to improve the parallel efficiency.One domain decomposition is adopted on cluster parallel computer system.The computing cost of TLM is about as double as the original model and ADM's is about 3 times as that.The communication cost of ADM is about as double as the original parallel model.The speed-up of TLM is the best among three models. |
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| Keywords: | parallel model tangent linear model adjoint model computing cost communiation cost |
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