Efficient Router Architecture, Design and Performance Exploration for Many-Core Hybrid Photonic Network-on-Chip (2D-PHENIC)

Abstract

Nowadays, increasing emerging application complexity and improvement in process technology have enabled the design of many-core processors with tens to hundreds of cores on a single chip. Photonic Network-on-Chips (PNoCs) have recently been proposed as an alternative approach with high performance-per-watt characteristics for intra-chip communication. While providing large bandwidth through WDM (Wavelength Division Multiplexing), the main design challenge of conventional hybrid PNoC lies in the control layer, which is generally used for path set-up and also for short message communication.In this paper, we propose architecture and design of an efficient router for control and communication in heterogeneous Many-core Hybrid Photonic Network-on-Chip (2D-PHENIC) 1 . In addition, we present detailed complexity and performance evaluation of the proposed architecture.

Hybrid silicon-photonic network-on-chip for future generations of high-performance many-core systems

“…The circuit-switched nature of these hybrid PNoCs directly affects the performance and power characteristics of on-chip communication. As observed in our previously conducted study [20], hybrid PNoCs' energy overhead is mainly caused by the ECN which consumes more than 90% of the total power budget. Moreover, the latency required to execute the different steps involved in the path setting is found to be about three times longer than the photonic data transfer itself.…”

“…The second category is cluster-based where the electronic and the optical networks are used for local and global communications, respectively. Previously in [20], we proposed a hybrid photonic NoC where the electronic layer is based on OASIS router [13] and the photonic switch is based on the work of Wang et al [50]. In this work, a quantitative study was performed and we showed the importance of the optimization of the electronic layer.…”

“…Previously in [20], we performed a preliminary evaluation where we analyzed the performance of our earlier proposed photonic NoC [4]. The evaluation is performed under different message sizes, network sizes, and with different synthetic traffic patterns.…”

“…• A quantitative and performance study was performed on our earlier photonic NoC [4,20] upon which the proposed system is based. In this study, we analyze in detail the behavior Preprint copy.…”

An Optimization Algorithm to Build Low Congestion Multi-Ring Topology for Optical Network-on-Chip

“…When an IP core has N ring rings to communicate with other IP cores, the interface of this core has N ring +1 micro-rings. Thus, according to comparing the number of micro-rings in different network with different optical switches, crossbar, cygnus [13], crux [16], switches from [14], [15] and [17]. From the table in Table 1, we can see that the number of micro-ring optical switches of multi-ring is less than that in other optical switches.…”