QBLESS: A case for QoS-aware bufferless NoCs
Paper in proceedings, 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 6914305

Subject Categories

Computer Engineering

DOI

10.1109/IWQoS.2014.6914305

ISBN

978-1-4799-4852-9