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QBLESS: A case for QoS-aware bufferless NoCs

Z. Yao ; X. Sui ; T. Xu ; J. Ma ; J. Fang ; Sally A McKee (Institutionen för data- och informationsteknik, Datorteknik (Chalmers)) ; B. Fu ; Y. Bao
22nd IEEE International Symposium of Quality of Service, IWQoS 2014; Hong Kong; Hong Kong; 26 May 2014 through 27 May 2014 (1548-615X). p. 93-98. (2014)
[Konferensbidrag, refereegranskat]

Datacenters consolidate diverse applications to improve utilization. However when multiple applications are co-located on such platforms, contention for shared resources like Networks-on-Chip (NoCs) can degrade the performance of latency-critical online services (high-priority applications). Recently proposed bufferless NoCs have the advantages of requiring less area and power, but they pose challenges in quality-of-service (QoS) support, which usually relies on buffer-based virtual channels (VCs). We propose QBLESS, a QoS-aware bufferless NoC scheme for datacenters. QBLESS consists of two components: a routing mechanism (QBLESS-R) that can substantially reduce flit deflection for high-priority applications, and a congestion-control mechanism (QBLESS-CC) that guarantees performance for high-priority applications and improves overall system throughput. We use trace-driven simulation to model a 64-core system, finding that when compared to BLESS, a previous state-of-the-art bufferless NoC design, QBLESS improves performance of high-priority applications by an average of 33.2%.

Nyckelord: Cloud Computing, Congestion Control, Networks-On-Chip (NoCs), QoS


Article number 6914305



Denna post skapades 2014-10-28. Senast ändrad 2016-03-22.
CPL Pubid: 204967

 

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Institutioner (Chalmers)

Institutionen för data- och informationsteknik, Datorteknik (Chalmers)

Ämnesområden

Datorteknik

Chalmers infrastruktur