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首页> 外文会议>2015 Workshop on Exploiting Silicon Photonics for Energy-Efficient High Performance Computing >Channel Allocation Protocol for Reconfigurable Optical Network-on-Chip
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Channel Allocation Protocol for Reconfigurable Optical Network-on-Chip

机译：可重配置片上光网络的信道分配协议

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The current evolution of system architectures leads towards implementation of large number of processor cores into the same circuit. This evolution actually supports the performance increase and provides the capability to support the execution of very complex applications. Nevertheless, if these new architectures propose high computational performances, an important bottleneck appears for the communications between processors. Implementation of a classical electrical NoC is generally too limited for such architectures and cannot support the bandwidth required by the applications. To address this problem, Optical Network-on-Chips (ONoCs) are studied since several years. By using integrated optical technology in addition to classical technology, an ONoC can significantly increase bandwidth and decrease latency in a MPSoC based on a 3D architecture. The integration of such optical layer into a MPSoC requires to define a protocol for the communication, and in particular a protocol for the reservation of the wavelengths which ensures the communications. This paper addresses this problem and proposes a wavelength reservation protocol handled by an Optical Network Interface (ONI) Manager for reconfigurable ONoC based on shared waveguide. It allows to efficiently allocate, at runtime, the optical communication channels for a manycore architecture. The paper describes the ONI manager architecture and reservation protocol. To evaluate the performances of this interface, we have implemented it with 28nm FDSOI technology. The synthesis results demonstrate that our interface can support a high frequency of 550 MHz with 6 wavelengths managed. From these results, we can be optimistic about the scaling of the ONoC and its capacity to manage a large number of processors and more wavelengths.
机译：系统体系结构的当前发展导致在同一电路中实现大量处理器内核。这种演变实际上支持性能的提高，并提供了支持非常复杂的应用程序执行的能力。但是，如果这些新架构提出了较高的计算性能，则处理器之间的通信将出现重要的瓶颈。对于这种架构，经典电气NoC的实现通常太受限制，无法支持应用程序所需的带宽。为了解决这个问题，几年来一直在研究片上光网络（ONoC）。通过使用除经典技术之外的集成光学技术，ONoC可以显着增加带宽并减少基于3D架构的MPSoC中的延迟。将该光学层集成到MPSoC中需要定义用于通信的协议，尤其是用于确保通信的波长保留的协议。本文解决了这一问题，并提出了一种由光网络接口（ONI）管理器处理的波长保留协议，用于基于共享波导的可重配置ONoC。它允许在运行时有效地为多核体系结构分配光通信通道。本文介绍了ONI管理器体系结构和预留协议。为了评估该接口的性能，我们已使用28nm FDSOI技术对其进行了实现。综合结果表明，我们的界面可以支持550 MHz的高频，并管理6个波长。从这些结果，我们可以对ONoC的规模及其管理大量处理器和更多波长的能力感到乐观。

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