QBLESS: A case for QoS-aware bufferless NoCs
Paper in proceeding, 2014
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%.
Networks-On-Chip (NoCs)
QoS
Congestion Control
Cloud Computing
Author
Z. Yao
Beijing University of Technology
Institute of Computing Technology Chinese Academy of Sciences
X. Sui
Institute of Computing Technology Chinese Academy of Sciences
T. Xu
Chinese Academy of Sciences
Institute of Computing Technology Chinese Academy of Sciences
J. Ma
Chinese Academy of Sciences
Institute of Computing Technology Chinese Academy of Sciences
J. Fang
Beijing University of Technology
Sally A McKee
Chalmers, Computer Science and Engineering (Chalmers), Computer Engineering (Chalmers)
B. Fu
Institute of Computing Technology Chinese Academy of Sciences
Y. Bao
Beijing University of Technology
IEEE International Workshop on Quality of Service, IWQoS
1548615X (ISSN)
93-98 6914305978-1-4799-4852-9 (ISBN)
Subject Categories (SSIF 2011)
Computer Engineering
DOI
10.1109/IWQoS.2014.6914305
ISBN
978-1-4799-4852-9