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NetVM: High Performance and Flexible Networking Using Virtualization on Commodity Platforms

Authors: 

Jinho Hwang, The George Washington University; K. K. Ramakrishnan, Rutgers University; Timothy Wood, The George Washington University

Abstract: 

NetVM brings virtualization to the Network by enabling high bandwidth network functions to operate at near line speed, while taking advantage of the flexibility and customization of low cost commodity servers. NetVM allows customizable data plane processing capabilities such as firewalls, proxies, and routers to be embedded within virtual machines, complementing the control plane capabilities of Software Defined Networking. NetVM makes it easy to dynamically scale, deploy, and reprogram network functions. This provides far greater flexibility than existing purpose-built, sometimes proprietary hardware, while still allowing complex policies and full packet inspection to determine subsequent processing. It does so with dramatically higher throughput than existing software router platforms.

NetVM is built on top of the KVM platform and Intel DPDK library. We detail many of the challenges we have solved such as adding support for high-speed inter-VM communication through shared huge pages and enhancing the CPU scheduler to prevent overheads caused by inter-core communication and context switching. NetVM allows true zero-copy delivery of data to VMs both for packet processing and messaging among VMs within a trust boundary. Our evaluation shows how NetVM can compose complex network functionality from multiple pipelined VMs and still obtain throughputs up to 10 Gbps, an improvement of more than 250% compared to existing techniques that use SR-IOV for virtualized networking.

Jinho Hwang, The George Washington University

K. K. Ramakrishnan, Rutgers University

Timothy Wood, The George Washington University

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BibTeX
@inproceedings {179739,
author = {Jinho Hwang and K. K. Ramakrishnan and Timothy Wood},
title = {NetVM: High Performance and Flexible Networking Using Virtualization on Commodity Platforms},
booktitle = {11th {USENIX} Symposium on Networked Systems Design and Implementation ({NSDI} 14)},
year = {2014},
isbn = {978-1-931971-09-6},
address = {Seattle, WA},
pages = {445--458},
url = {https://www.usenix.org/conference/nsdi14/technical-sessions/presentation/hwang},
publisher = {{USENIX} Association},
month = apr,
}
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