Affiliation:
1. Indian Institute of Technology Delhi, Hauz Khas, New Delhi
Abstract
This article presents
BigBus
, a novel design of an on-chip photonic network for a 1,024-node system. For such a large on-chip network, performance and power reduction are two mutually conflicting goals. This article uses a combination of strategies to reduce static power consumption while simultaneously improving performance and the energy-delay
2
(
ED
2
) product. The crux of the article is to segment the entire system into smaller clusters of nodes and adopt a hybrid strategy for each segment that includes conventional laser modulation, as well as a novel technique for sharing power across nodes dynamically. We represent energy internally as tokens, where one token will allow a node to send a message to any other node in its cluster. We allow optical stations to arbitrate for tokens at a global level, and then we predict the number of token equivalents of power that the off-chip laser needs to generate. Using these techniques,
BigBus
outperforms other competing proposals. We demonstrate a speedup of 14--34% over state of the art proposals and a 20--61% reduction in
ED
2
.
Publisher
Association for Computing Machinery (ACM)
Subject
Electrical and Electronic Engineering,Hardware and Architecture,Software
Cited by
12 articles.
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