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 proceedingConference 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 languageEnglish
Title of host publicationAPSys 2021 - Proceedings of the 12th ACM SIGOPS Asia-Pacific Workshop on Systems
PublisherAssociation for Computing Machinery, Inc
Pages131-137
Number of pages7
ISBN (Electronic)9781450386982
DOIs
Publication statusPublished - 2020 Aug 24
Event12th ACM SIGOPS Asia-Pacific Workshop on Systems, APSys 2021 - Virtual, Online, China
Duration: 2021 Aug 242021 Aug 25

Publication series

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

Conference

Conference12th ACM SIGOPS Asia-Pacific Workshop on Systems, APSys 2021
Country/TerritoryChina
CityVirtual, Online
Period21/8/2421/8/25

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

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