Congestion control advancements in Linux

This paper describes the recent advancements in network congestion control in the Linux kernel. Specifically the paper focuses on the TCP congestion framework, and the implementation of the DCCP protocol stack. Linux has had multiple TCP congestion methods added to it and the subsequent growth of the codebase has made development difficult. As a result a congestion control framework has been introduced. This paper also outlines how the congestion control framework was used to implement TCP–Nice. TCP–Nice is an experimental congestion control mechanism that uses less than it’s fair share of bandwidth when there is congestion, much like nice does for CPU usage by processes in the Unix operating system.