Analyzing a decade of Linux system calls

Over the past 25 years, thousands of developers have contributed more than 18 million lines of code (LOC) to the Linux kernel. As the Linux kernel forms the central part of various operating systems that are used by millions of users, the kernel must be continuously adapted to the changing demands a...

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Vydané v:Empirical software engineering : an international journal Ročník 23; číslo 3; s. 1519 - 1551
Hlavní autori: Bagherzadeh, Mojtaba, Kahani, Nafiseh, Bezemer, Cor-Paul, Hassan, Ahmed E., Dingel, Juergen, Cordy, James R.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: New York Springer US 01.06.2018
Springer Nature B.V
Predmet:
Compilers
Computer Science
Empirical analysis
Evolution
Interpreters
Kernels
Linux
Operating systems
Product development
Programming Languages
Software Engineering/Programming and Operating Systems
Empirical software engineering
Software evolution
API evolution
Linux kernel
System calls
ISSN:1382-3256, 1573-7616
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Shrnutí:Over the past 25 years, thousands of developers have contributed more than 18 million lines of code (LOC) to the Linux kernel. As the Linux kernel forms the central part of various operating systems that are used by millions of users, the kernel must be continuously adapted to the changing demands and expectations of these users. The Linux kernel provides its services to an application through system calls. The combined set of all system calls forms the essential Application Programming Interface (API) through which an application interacts with the kernel. In this paper, we conduct an empirical study of 8,770 changes that were made to Linux system calls during the last decade (i.e., from April 2005 to December 2014). In particular, we study the size of the changes, and we manually identify the type of changes and bug fixes that were made. Our analysis provides an overview of the evolution of the Linux system calls over the last decade. We find that there was a considerable amount of technical debt in the kernel, that was addressed by adding a number of sibling calls (i.e., 26% of all system calls). In addition, we find that by far, the ptrace() and signal handling system calls are the most challenging to maintain. Our study can be used by developers who want to improve the design and ensure the successful evolution of their own kernel APIs.
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ISSN:1382-3256
1573-7616
DOI:10.1007/s10664-017-9551-z