Modeling UGAL on the Dragonfly Topology
Modeling UGAL on the Dragonfly Topology
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在 Dragonfly 拓扑上建模 UGAL
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
M. Lang
中科院分区：
文献类型：
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作者：
Md Atiqul Mollah;Peyman Faizian;Md. Shafayat Rahman;Xin Yuan;S. Pakin;M. Lang
蜻蜓拓扑已被提出并部署为下一代超级计算机的互连网络拓扑。为蜻蜓开发的实用路由算法是基于一种包含全球信息（ugal-g）的通用全球自适应负载均衡的路由方案。虽然已经对UGAL-G和基于UGAL的实践路由方案进行了广泛的研究，但所有现有结果均基于模拟或测量。没有理论上了解基于UGAL的路由方案如何在特定网络配置上实现其性能以及路由方案的优化。在这项工作中，我们在蜻蜓拓扑上开发并验证了ugal-G的吞吐量模型，并确定了许多在许多蜻蜓变化中既准确又有效的模型。给定交通模式，提出的模型可以准确有效地估计该模式的总吞吐量。我们的结果不仅提供了一种预测大型蜻蜓网络的沟通性能的机制，而且还揭示了ugal-g的内部工作，这进一步增进了我们对蜻蜓基于ugal的路由的理解。
The Dragonfly topology has been proposed and deployed as the interconnection network topology for next-generation supercomputers. Practical routing algorithms developed for Dragonfly are based on a routing scheme called Universal Globally Adaptive Load-balanced routing with Global information (UGAL-G). While UGAL-G and UGAL-based practical routing schemes have been extensively studied, all existing results are based on simulation or measurement. There is no theoretical understanding of how the UGAL-based routing schemes achieve their performance on a particular network configuration as well as what the routing schemes optimize for. In this work, we develop and validate throughput models for UGAL-G on the Dragonfly topology and identify a robust model that is both accurate and efficient across many Dragonfly variations. Given a traffic pattern, the proposed models estimate the aggregate throughput for the pattern accurately and effectively. Our results not only provide a mechanism to predict the communication performance for large scale Dragonfly networks but also reveal the inner working of UGAL-G, which furthers our understanding of UGAL-based routing on Dragonfly.