Name
Title | ||
|---|---|---|
Wavelength stealing: an opportunistic approach to channel sharing in multi-chip photonic interconnects |
Abstract | ||
|---|---|---|
Silicon photonic technology offers seamless integration of multiple chips with high bandwidth density and lower energy-per-bit consumption compared to electrical interconnects. The topology of a photonic interconnect impacts both its performance and laser power requirements. The point-to-point (P2P) topology offers arbitration-free connectivity with low energy-per-bit consumption, but suffers from low node-to-node bandwidth. Topologies with channel-sharing improve inter-node bandwidth but incur higher laser power consumption in addition to the performance costs associated with arbitration and contention. In this paper, we analytically demonstrate the limits of channel-sharing under a fixed laser power budget and quantify its maximum benefits with realistic device loss characteristics. Based on this analysis, we propose a novel photonic interconnect architecture that uses opportunistic channel-sharing. The network does not incur any arbitration overheads and guarantees fairness. We evaluate this interconnect architecture using detailed simulation in the context of a 64-node photonically interconnected message passing multichip system. We show that this new approach achieves up to 28% better energy-delay-product (EDP) compared to the P2P network for HPC applications. Furthermore, we show that when applied to a cluster partitioned into multiple virtual machines (VM), this interconnect provides a guaranteed 1.27× higher node-to-node bandwidth regardless of the traffic patterns within each VM. |
Year | DOI | Venue |
|---|---|---|
2013 | 10.1145/2540708.2540728 | MICRO |
Keywords | Field | DocType |
multi-chip photonic interconnects,opportunistic approach,high bandwidth density,fixed laser power budget,low node-to-node bandwidth,low energy-per-bit consumption,node-to-node bandwidth,laser power requirement,higher laser power consumption,inter-node bandwidth,lower energy-per-bit consumption,silicon photonic technology,nanophotonics | Computer science,Parallel computing,Computer network,Communication channel,Network topology,Chip,Real-time computing,Bandwidth (signal processing),Laser power scaling,Interconnection,Photonics,Message passing | Conference |
ISBN | Citations | PageRank |
978-1-5090-6603-2 | 10 | 0.46 |
References | Authors | |
19 | 6 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Arslan Zulfiqar | 1 | 10 | 0.46 |
| Pranay Koka | 2 | 112 | 6.81 |
| Herb Schwetman | 3 | 375 | 87.15 |
| M. H. Lipasti | 4 | 1303 | 110.38 |
| Xuezhe Zheng | 5 | 169 | 15.89 |
| Ashok Krishnamoorthy | 6 | 10 | 0.46 |