A measurement-based analysis of the real-time performance of Linux

被引：40

作者：

Abeni, L ^{[1
]}

Goel, A ^{[1
]}

Krasic, C ^{[1
]}

Snow, J ^{[1
]}

Walpole, J ^{[1
]}

机构：

[1] Oregon Grad Inst, Dept Comp Sci & Engn, Portland, OR USA

来源：

EIGHTH IEEE REAL-TIME AND EMBEDDED TECHNOLOGY AND APPLICATIONS SYMPOSIUM, PROCEEDINGS | 2002年

关键词：

D O I：

10.1109/RTTAS.2002.1137388

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper presents an experimental study of the latency behavior of the Linux OS. We identify major sources of latency in the kernel with the goal of providing real-time performance in a widely used general-purpose operating system. We quantib, each source of latency with a series of micro-benchmarks and also evaluate the effects of latency on a time-sensitive application. Our analysis shows that there are two main causes of latency in the OS: timer resolution and non-preemptable sections. Our experiments show that in the standard Linux kernel the timer resolution latency is predominant, and generally hides the non-preemptable section latency We use accurate timers to reduce timer resolution latency and then analyze the non-preemptable section latency for several variants of Linux.

引用

页码：133 / 142

页数：10