Computer Science and Information Engineering, World Congress on (2009)
Los Angeles, California USA
Mar. 31, 2009 to Apr. 2, 2009
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/CSIE.2009.277
Clock precision directly affects that if tasks can be timely responded and scheduled or not. As a time-sharing system, Linux cyclical time granularity can not achieve microsecond response precision. Simply raising clock frequency means that the clock interrupt's process will take up too much time of processor. And it makes the system's effective utilization decline. This paper introduces some ways of improving clock's precision for real-time Linux, analyses the theory of MontaVista Linux high resolution timer (HRT) mechanism, implements a high-precision clock in current popular embedded operating systems through modifying Linux kernel to design a Linux high-precision timer to raising the Linux clock precision effectively.
Linux, clock precision, real-time operating system, high-precision timer
M. Liang-liang, Z. Fei-fan and Y. Dun-fan, "Design and Implementation of High-Precision Timer in Linux," 2009 WRI World Congress on Computer Science and Information Engineering, CSIE(CSIE), Los Angeles, CA, 2009, pp. 341-345.