Method for improving interruption delay of embedded type real-time operation system

Abstract

The invention discloses a method for improving the interruption delay of an embedded type real-time operation system. The method comprises the following steps: creating a system service mark, a critical section mark, a non-real time interruption mark and an interruption service routine annular array to be processed; programming an arbitrary operation system service, an interruption processing program of non-real time interruption and the task scheduling of an operation system by specific steps: finally registering the interruption processing program of non-real time interruption into an interruption vector table and registering an interruption service routine of real-time interruption into the interruption vector table. The invention does not perform closing interruption operation at all in the realizing process of the system service of the operation system, and can shorten the maximal interruption prohibited time and reduce the interruption delay, thereby improving the instantaneity of the embedded type real-time operation system. The invention has less time and space cost needed by realizing interruption management and is quite suitable for a microkernel embedded type real-time operation system.

Description

technical field [0001] The invention relates to an embedded real-time operating system, in particular to a method for improving the interruption delay of the embedded real-time operating system. Background technique [0002] As the complexity of embedded real-time applications increases, embedded real-time operating systems are increasingly widely used to achieve task scheduling, resource management, synchronization and communication, precise timing, and I / O management. The embedded real-time operating system needs to respond to external events in time, so it has extremely high requirements for real-time performance, which is the main difference between it and general operating systems. There are two important indicators to evaluate the real-time performance of a real-time operating system, namely task scheduling time and interrupt delay. [0003] Interrupt Latency refers to the time required from the occurrence of an interrupt to the operating system responding and executi...

AI Technical Summary

Problems solved by technology

[0005] Turning off interrupts inevitably increases the interrupt delay of the application system, resulting in a decrease in the real-time performance of the application system

In fact, the processing of most interrupts has nothing to do with the kernel data structure of the operating system. Turning off interrupts increases the delay time of these interrupts that have nothing to do with the critical section.

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