Electrical Engineering
      and Computer Sciences

Electrical Engineering and Computer Sciences

COLLEGE OF ENGINEERING

UC Berkeley

The Impact of Buffer Management on Networking Software Performance in Berkeley UNIX 4.2BSD: A Case Study

Luis Felipe Cabrera, Michael J. Karels and David A. Mosher

EECS Department
University of California, Berkeley
Technical Report No. UCB/CSD-85-247
January 1985

http://www.eecs.berkeley.edu/Pubs/TechRpts/1985/CSD-85-247.pdf

Berkeley UNIX 4.2BSD is an operating system which provides easy networking among 4.2BSD installations and others supporting DOD's Internet protocols. Moreover, it also offers alternative ways for processes to communicate with each other both within and across machine boundaries. Processes need not have a common ancestor to communicate and they may do so using different addressing families and styles of communication. In addition, several protocol families may be supported simultaneously.

In this paper we present a detailed timing analysis of the dynamic behavior of the TCP/IP and the UDP/IP network communication protocols' current implementation in Berkeley UNIX 4.2BSD. These measurements show the effect that kernel buffer management has on the network software performance. We discuss issues and tradeoffs involved when implementing network communication mechanisms for multiple-protocol systems. We highlight the intricate interrelationships arising from the simultaneous coexistence of different buffering policies within a system.

This study also sheds light on the inefficiencies encountered when software and hardware perform the same actions on data, e.g., checksums.


BibTeX citation:

@techreport{Cabrera:CSD-85-247,
    Author = {Cabrera, Luis Felipe and Karels, Michael J. and Mosher, David A.},
    Title = {The Impact of Buffer Management on Networking Software Performance in Berkeley UNIX 4.2BSD: A Case Study},
    Institution = {EECS Department, University of California, Berkeley},
    Year = {1985},
    Month = {Jan},
    URL = {http://www.eecs.berkeley.edu/Pubs/TechRpts/1985/6072.html},
    Number = {UCB/CSD-85-247},
    Abstract = {Berkeley UNIX 4.2BSD is an operating system which provides easy networking among 4.2BSD installations and others supporting DOD's Internet protocols. Moreover, it also offers alternative ways for processes to communicate with each other both within and across machine boundaries. Processes need not have a common ancestor to communicate and they may do so using different addressing families and styles of communication. In addition, several protocol families may be supported simultaneously.  <p>  In this paper we present a detailed timing analysis of the dynamic behavior of the TCP/IP and the UDP/IP network communication protocols' current implementation in Berkeley UNIX 4.2BSD. These measurements show the effect that kernel buffer management has on the network software performance. We discuss issues and tradeoffs involved when implementing network communication mechanisms for multiple-protocol systems. We highlight the intricate interrelationships arising from the simultaneous coexistence of different buffering policies within a system.  <p>  This study also sheds light on the inefficiencies encountered when software and hardware perform the same actions on data, e.g., checksums.}
}

EndNote citation:

%0 Report
%A Cabrera, Luis Felipe
%A Karels, Michael J.
%A Mosher, David A.
%T The Impact of Buffer Management on Networking Software Performance in Berkeley UNIX 4.2BSD: A Case Study
%I EECS Department, University of California, Berkeley
%D 1985
%@ UCB/CSD-85-247
%U http://www.eecs.berkeley.edu/Pubs/TechRpts/1985/6072.html
%F Cabrera:CSD-85-247