On TCP Throughput Pathology in CPU-Bound Communication over Automotive Ethernet

Wongoo Han, Sangrok Han, Hyogon Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution


TCP protocol optimized for the general Internet environment can fail to maximally realize its potential in the in-vehicular network environment such as the automotive Ethernet. In this paper, we demonstrate that a throughput pathology can develop in the TCP communication between two ECUs that are typically lower-speed machines. We find that it stems from how the processing power is divided between the TCP kernel packet processing and the sending application at the TCP sender side. Moreover, once it sets in, it persistently decreases the TCP throughput by few tens of megabits per second (Mbps) over an extended period of time. Through kernel profiling and TCP code analysis, we prescribe a remedy that solves the pathology and enables ECUs to fully materialize the maximum throughput.

Original languageEnglish
Title of host publication2018 IEEE Vehicular Networking Conference, VNC 2018
EditorsChih-Yu Wang, Mate Boban, Onur Altintas, Taylan Sahin, Hsin-Mu Tsai, Kate Lin
PublisherIEEE Computer Society
ISBN (Electronic)9781538694282
Publication statusPublished - 2019 Jan 28
Event2018 IEEE Vehicular Networking Conference, VNC 2018 - Taipei, Taiwan, Province of China
Duration: 2018 Dec 52018 Dec 7

Publication series

NameIEEE Vehicular Networking Conference, VNC
ISSN (Print)2157-9857
ISSN (Electronic)2157-9865


Conference2018 IEEE Vehicular Networking Conference, VNC 2018
Country/TerritoryTaiwan, Province of China


  • TCP
  • in-vehicle network
  • pathology
  • throughput

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Automotive Engineering
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Transportation


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