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A New Optoelectronic Hybrid Network Based on Scheduling Optimization of Optical Links
IEEE Transactions on Computers ( IF 3.7 ) Pub Date : 2021-01-25 , DOI: 10.1109/tc.2021.3054308
En Shao , Guangming Tan , Zhan Wang , Guojun Yuan , Zheng Cao , Ninghui Sun

The emergence of exascale computers will represent a milestone in high-performance computing (HPC). Optoelectronic interconnections and configurable switches will change the traditional supercomputer architecture. However, new hardware is not easily adapted to dynamic running conditions. Based on scheduling optimization of optical links, we propose a new optoelectronic hybrid network, the software-defined network accelerator ( sDNA ), for an exascale computer. Our scheduling optimization contains an optical interconnection method and an adaptive routing method. The main contribution of our work is an extended edge forwarding index (E-EFI) optical interconnection method based on slow-switching optical devices. The optical link connections are established by evaluating the traffic offloading revenue for each optical link candidate. To support optical interconnection, sDNA selects a suitable routing strategy according to the job-schedule information and prior HPC application knowledge. We tested sDNA in a network simulator and a prototype exascale computer system using both the US Department of Energy (DOE) application and real-world communication benchmarks. The verification results for traffic offloading reveal that our optical interconnection method not only offloads traffic from electrical links to optical links but also avoids the congestion inherent to electrical links. sDNA maintains a throughput of more than 80 percent bandwidth and reduces the communication delay by 10 percent in our real prototype system and simulator. Thus, sDNA is an ideal candidate for accelerating the communication performance of exascale computers.

中文翻译:

基于光链路调度优化的新型光电混合网络

百亿亿次计算机的出现将代表高性能计算(HPC)的里程碑。光电互连和可配置开关将改变传统的超级计算机架构。但是,新硬件不容易适应动态运行条件。基于光链路的调度优化,我们提出了一种新的光电混合网络,即软件定义的网络加速器( 脱氧核糖核酸 ),用于百亿分之一的计算机。我们的调度优化包括光互连方法和自适应路由方法。我们工作的主要贡献是基于慢速交换光学设备的扩展边缘转发索引(E-EFI)光学互连方法。通过评估每个光链路候选者的业务分流收入来建立光链路连接。为了支持光互连,脱氧核糖核酸根据作业计划信息和先前的HPC应用知识选择合适的路由策略。我们测试了脱氧核糖核酸使用美国能源部(DOE)应用程序和实际通信基准测试的网络仿真器和百亿亿次计算机原型计算机。流量分流的验证结果表明,我们的光互连方法不仅可以将流量从电链路分流到光链路,而且还可以避免电链路固有的拥塞。脱氧核糖核酸在我们的真实原型系统和仿真器中,可保持80%以上带宽的吞吐量,并减少10%的通信延迟。因此,脱氧核糖核酸 是加速百亿亿次计算机通信性能的理想人选。
更新日期:2021-01-25
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