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Improved forwarding architecture and resource management for multi-core software routers

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Publication date2009
Host publicationNPC '09: Proceedings of the 2009 Sixth IFIP International Conference on Network and Parallel Computing
Place of PublicationWashington, DC, USA
PublisherIEEE Computer Society
Pages117-124
Number of pages8
ISBN (Electronic)9780769538372
ISBN (Print)9781424449903
<mark>Original language</mark>English

Abstract

Recent technological advances in commodity server architectures, with multiple multi-core CPUs, integrated memory controllers, high-speed interconnects and enhanced network interface cards, provide substantial computational capacity and thus an attractive platform for packet forwarding. However, to exploit this available capacity, we need a suitable software platform that allows effective parallel packet processing and resource management. In this paper, we at first introduce an improved forwarding architecture for software routers that enhances parallelism by exploiting hardware classification and multi-queue support, already available in recent commodity network interface cards. After evaluating the original scheduling algorithm of the widely-used Click modular router, we propose solutions for extending this scheduler for improved fairness, throughput and more precise resource management. To illustrate the potential benefits of our proposal, we implement and evaluate a few key elements of our overall design.