Enhanced control path for repeated TCP connections

Junho Lee; Gyeongsik Yang; Zhixiong Niu; Peng Cheng; Yongqiang Xiong; Chuck Yoo

doi:10.1145/3476886.3477512

Enhanced control path for repeated TCP connections

Junho Lee, Gyeongsik Yang, Zhixiong Niu, Peng Cheng, Yongqiang Xiong, Chuck Yoo

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

This paper presents FALTCON that enhances the control path for repeated TCP connections. First, we measure and find that the control path of TCP stack consumes as many CPU cycles as that of the data path, which brings up the importance of optimizing the control path. Yet, to the best of our knowledge, there has been little research effort on investigating the control path. Also, we observe that a significant portion of TCP traffic (e.g., HTTP) is not only short-lived but also repeated for a server and client pair. We design FALTCON to take advantage of the property of being repeated. Specifically, FALTCON re-designs the control path to remove the duplicate allocation of the structures and redundant operations over them. FALTCON is implemented in Linux 5.1 that has the latest and highly efficient networking stack. Furthermore, we optimize FALTCON to be lockless entirely and to work per-core. The experiment results show that FALTCON achieves a higher number of connections than Linux, up to 19%, and with much less CPU cycles up to 31%.

Original language	English
Title of host publication	APSys 2021 - Proceedings of the 12th ACM SIGOPS Asia-Pacific Workshop on Systems
Publisher	Association for Computing Machinery, Inc
Pages	131-137
Number of pages	7
ISBN (Electronic)	9781450386982
DOIs	https://doi.org/10.1145/3476886.3477512
Publication status	Published - 2020 Aug 24
Event	12th ACM SIGOPS Asia-Pacific Workshop on Systems, APSys 2021 - Virtual, Online, China Duration: 2021 Aug 24 → 2021 Aug 25

Publication series

Name	APSys 2021 - Proceedings of the 12th ACM SIGOPS Asia-Pacific Workshop on Systems

Conference

Conference	12th ACM SIGOPS Asia-Pacific Workshop on Systems, APSys 2021
Country/Territory	China
City	Virtual, Online
Period	21/8/24 → 21/8/25

Bibliographical note

Publisher Copyright:
© 2021 ACM.

Keywords

Kernel TCP stack
Operating system
Repeated TCP
Short-lived TCP
TCP

ASJC Scopus subject areas

Computer Networks and Communications
Hardware and Architecture

Access to Document

10.1145/3476886.3477512

Cite this

Lee, J., Yang, G., Niu, Z., Cheng, P., Xiong, Y., & Yoo, C. (2020). Enhanced control path for repeated TCP connections. In APSys 2021 - Proceedings of the 12th ACM SIGOPS Asia-Pacific Workshop on Systems (pp. 131-137). (APSys 2021 - Proceedings of the 12th ACM SIGOPS Asia-Pacific Workshop on Systems). Association for Computing Machinery, Inc. https://doi.org/10.1145/3476886.3477512

Enhanced control path for repeated TCP connections. / Lee, Junho; Yang, Gyeongsik; Niu, Zhixiong et al.
APSys 2021 - Proceedings of the 12th ACM SIGOPS Asia-Pacific Workshop on Systems. Association for Computing Machinery, Inc, 2020. p. 131-137 (APSys 2021 - Proceedings of the 12th ACM SIGOPS Asia-Pacific Workshop on Systems).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Lee, J, Yang, G, Niu, Z, Cheng, P, Xiong, Y & Yoo, C 2020, Enhanced control path for repeated TCP connections. in APSys 2021 - Proceedings of the 12th ACM SIGOPS Asia-Pacific Workshop on Systems. APSys 2021 - Proceedings of the 12th ACM SIGOPS Asia-Pacific Workshop on Systems, Association for Computing Machinery, Inc, pp. 131-137, 12th ACM SIGOPS Asia-Pacific Workshop on Systems, APSys 2021, Virtual, Online, China, 21/8/24. https://doi.org/10.1145/3476886.3477512

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Enhanced control path for repeated TCP connections

Abstract

Publication series

Conference

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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