Tuning Linux to meet real time requirements

Richard S. Herbel; Dang N. Le

doi:10.1117/12.719031

7 May 2007 Tuning Linux to meet real time requirements

Richard S. Herbel, Dang N. Le

Proceedings Volume 6569, Acquisition, Tracking, Pointing, and Laser Systems Technologies XXI; 65690M (2007) https://doi.org/10.1117/12.719031
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

Abstract

There is a desire to use Linux in military systems. Customers are requesting contractors to use open source to the maximal possible extent in contracts. Linux is probably the best operating system of choice to meet this need. It is widely used. It is free. It is royalty free, and, best of all, it is completely open source. However, there is a problem. Linux was not originally built to be a real time operating system. There are many places where interrupts can and will be blocked for an indeterminate amount of time. There have been several attempts to bridge this gap. One of them is from RTLinux, which attempts to build a microkernel underneath Linux. The microkernel will handle all interrupts and then pass it up to the Linux operating system. This does insure good interrupt latency; however, it is not free [1]. Another is RTAI, which provides a similar typed interface; however, the PowerPC platform, which is used widely in real time embedded community, was stated as "recovering" [2]. Thus this is not suited for military usage. This paper provides a method for tuning a standard Linux kernel so it can meet the real time requirement of an embedded system.

Citation Download Citation

Richard S. Herbel and Dang N. Le "Tuning Linux to meet real time requirements", Proc. SPIE 6569, Acquisition, Tracking, Pointing, and Laser Systems Technologies XXI, 65690M (7 May 2007); https://doi.org/10.1117/12.719031

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