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2008
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Virtual Circuit Tree Multicasting: A Case for On-Chip Hardware Multicast Support

9 years 5 months ago
Virtual Circuit Tree Multicasting: A Case for On-Chip Hardware Multicast Support
Current state-of-the-art on-chip networks provide efficiency, high throughput, and low latency for one-to-one (unicast) traffic. The presence of one-to-many (multicast) or one-to-all (broadcast) traffic can significantly degrade the performance of these designs, since they rely on multiple unicasts to provide one-to-many communication. This results in a burst of packets from a single source and is a very inefficient way of performing multicast and broadcast communication. This inefficiency is compounded by the proliferation of architectures and coherence protocols that require multicast and broadcast communication. In this paper, we characterize a wide array of on-chip communication scenarios that benefit from hardware multicast support. We propose Virtual Circuit Tree Multicasting (VCTM) and present a detailed multicast router design that improves network performance by up to 90% while reducing network activity (hence power) by up to 53%. Our VCTM router is flexible enough to...
Natalie D. Enright Jerger, Li-Shiuan Peh, Mikko H.
Added 31 May 2010
Updated 31 May 2010
Type Conference
Year 2008
Where ISCA
Authors Natalie D. Enright Jerger, Li-Shiuan Peh, Mikko H. Lipasti
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