Designing manycore processor networks using silicon photonics

Joshi, Ajay; Batten, Christopher; Kwon, Yonghoon; Beamer, Scott; Shamim, Imran; Asanović, Krste; Stojanović, Vladimir

doi:10.1109/leos.2009.5343493

Cited by 1 publication

(2 citation statements)

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“…Consider the R-OWN communication shown in Figure 2. For example, core (0, 0, 0) and core (0, 7, 2) both want to send packets to core (1,7,3), and router (0, 3) (H0) possess the adaptive wireless link of cluster 0. In other words, adaptive wireless link-F0 is connected to cluster 1 at this point of time.…”

Section: Routing Mechanism Of 256-core R-ownmentioning

confidence: 99%

“…Optical interconnects o↵er several advantages such as low energy consumption (⇠0.25pJ/bit), reduced link latency (⇠ps), and increased bandwidth (⇠40Gbps) via wavelength division multiplexing (WDM)-all of which makes optics a suitable technology for on-chip communications [17], [14], [7], [3]. However, for large core counts, crossbar-based architectures such as Corona [17], Firefly [14], and 3D-NoC [12] su↵er from scalability issues because the number of ring modulators and photodetectors increase quadratically with the number of cores, thus resulting in high area and power overhead.…”

Section: Introductionmentioning

confidence: 99%

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Reconfigurable Optical and Wireless (R-OWN) Network-on-Chip for High Performance Computing

Sikder

Kodi

Louri

2016

Proceedings of the 3rd ACM International Conference on Nanoscale Computing and Communication

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With the scaling of technology, the industry is experiencing a shift from multi-core to many-core architectures. However, traditional on-chip metallic interconnects may not scale to support these many-core architectures due to the increased hop count, high power dissipation, and increased latency. Recently, attention has recently been shifted to emerging technologies such as optical and wireless interconnects for future on-chip communications. Although emerging technologies show promising results for power-e cient, low-latency, and scalable on-chip interconnects, the use of single technology may not be su cient to support future many-core architectures. In this paper, we propose a Reconfigurable Optical-Wireless Network-on-Chip (R-OWN) that facilitates communication through static optical links and reconfigurable wireless links. The network diameter of R-OWN is restricted to three hops by dividing the network into several optical domains of 64-cores (called a cluster) and by connecting the clusters using one-hop wireless network. The optical bandwidth is e ciently shared using time division multiplexing (TDM), and the wireless bandwidth is shared using frequency division multiplexing (FDM). Packets routed across optical and wireless networks are proved to be deadlock-free. Our results indicate that R-OWN improves energy-e ciency by 44-51%, performance (throughput and latency) by 13-31%, and area by 4-13% when compared to state-of-the-art wired, wireless, optical, and hybrid on-chip networks.

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Section: Routing Mechanism Of 256-core R-ownmentioning

confidence: 99%