Adding slow-silent virtual channels for low-power on-chip networks

Hiroki Matsutani, Michihiro Koibuchi, Daihan Wang, Hideharu Amano

研究成果: Conference contribution

34 被引用数 (Scopus)

抄録

In this paper, we introduce the use of slow-silent virtual channels to reduce the switching power of on-chip networks while keeping the leakage power small. Adding virtual channels to a network improves the throughput until each link bandwidth is saturated. This enables us to reduce the switching power of on-chip networks by decreasing their operating frequency and supply voltage. However, adding virtual channels increases the leakage power of routers as well as the area due to their large buffers; so the runtime power gating is applied to individual virtual channels to eliminate this problem. We evaluate the performance of slow-silent virtual channels by using real application traces, and their power consumption (switching and leakage) is evaluated based on the detailed design of a virtual-channel router placed and routed with a 90nm technology. These evaluation results show that a network with three or four virtual channels achieves the best energy efficiency in a uniform traffic. In the cases of neighboring communications, a network with two virtual channels is better than the other networks with more virtual channels, because the performance improvement from no virtual channel to two virtual channels is the largest and their frequency and supply voltage can also be reduced well in these cases.

本文言語English
ホスト出版物のタイトルProceedings - Second IEEE International Symposium on Networks-on-Chip, NOCS 2008
ページ23-32
ページ数10
DOI
出版ステータスPublished - 2008 5 28
イベント2nd IEEE International Symposium on Networks-on-Chip, NOCS 2008 - Newcastle upon Tyne, United Kingdom
継続期間: 2008 4 72008 4 11

出版物シリーズ

名前Proceedings - Second IEEE International Symposium on Networks-on-Chip, NOCS 2008

Other

Other2nd IEEE International Symposium on Networks-on-Chip, NOCS 2008
国/地域United Kingdom
CityNewcastle upon Tyne
Period08/4/708/4/11

ASJC Scopus subject areas

  • コンピュータ サイエンス(全般)

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