Dissecting Code Features: An Evolutionary Analysis of Kernel Versus Non-Kernel Code in Operating Systems.

The dataset includes evolution data for three systems (FreeBSD.zip,DragonFlyBSD.zip, and ToAruOS.zip). The files contain two types of data: The first is the different versions of code churn data, which represents the amount of code that has been added, modified, and deleted across all files in both versions (e.g. freebsd-src-release-5.5.0_cvs-freebsd-src-release-6.1.0-metrics-churn-file.csv); The second data is the code pointer values for a particular version (For example, freebsd-src-release-5.5.0_cvs-metrics-und-file.csv), which are collected by understand scitool.   In addition, (Supplementary Results)The_Evolution_of_Complexity_of_Non-Kernel_Code.pdf documents the evolution of complexity of non-kernel files.