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- Title
Optimization and design of high radix asymmetric crossbar.
- Authors
WANG Yong-qing; WANG Ke-fei; XIAO Li-quan; LIU Lu; PANG Zheng-binz
- Abstract
Head-of-line (HOL) blocking limits the throughput of high radix switches. An efficient architecture, OE-ASC, is proposed for high-radix switches. This architecture takes advantages of two cost-effective strategies for dealing with the HOL blocking problem. The first is referred to as asymmetric crossbar/ASC), through which a NXN switch can be formed by N/m smaller mXN asymmetric crossbars, and the second is odd-even queues scheme, through which the resources (mainly memory queues) of the switch can be used more efficiently. A tile-based microarchitecture of 32×32 high radix switch is proposed. Clock cycl-accurate simulation shows that the impact of HOL blocking is nearly all eliminated and the switch throughput can be as high as 98. 6%. The proposed OE-ASC architecture shows up to 7. 9% of throughput over ASC with buffer depth 16, and can achieve comparable performance with half buffers.
- Publication
Computer Engineering & Science / Jisuanji Gongcheng yu Kexue, 2013, Vol 35, Issue 11, p42
- ISSN
1007-130X
- Publication type
Article
- DOI
10.3969/j.issn.1007-130X.2013.11.007