NDLI: SpliceNP: a TCP splicer using a network processor

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SpliceNP: a TCP splicer using a network processor

Content Provider	ACM Digital Library
Author	Zhao, Li Luo, Yan Iyer, Ravi Bhuyan, Laxmi
Abstract	TCP Splicing can be used in content-aware switches to tremendously reduce overall request latency. In order to reduce the processing latency further, we propose to offload the protocol processing onto network processors (NPs). An NP consists of a multithreaded multiprocessor architecture that can provide high throughput for packet processing or forwarding. However, offloading any protocol software to an NP needs to be carefully designed due to its low-level programming and limited control memory size.In this paper, we first analyze the operation of TCP Splicing in detail and evaluate its performance through measurements on a Linux-based switch. Then various possibilities of workload allocation among different computation resources in an NP are presented, and the design tradeoffs are discussed. A content aware switch is implemented using IXP 2400 NP and evaluated for performance comparison. The measurement results demonstrate that our NP-based switch can reduce the http processing latency by an average of 83.3% for a 1K byte web page. The amount of reduction increases with larger file sizes. It is also shown that the packet throughput can be improved by up to 5.7x across a range of files by taking advantage of multithreading and multiprocessing, available in the NP.
Starting Page	135
Ending Page	143
Page Count	9
File Format	PDF
ISBN	1595930825
DOI	10.1145/1095890.1095909
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2005-10-26
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Network processors Tcp splicing
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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