Test system and test method of task priority inversion of multiple task operating system

Abstract

The invention relates to the field of computer multiple task operating system, discloses a test method of task priority inversion of a multiple task operating system based on task priority scheduling, and is used for positioning relevant information of task priority inversion quickly. The test method of the task priority inversion of the multiple task operating system includes the steps of: a. a priority inversion test management module registers a hook function on the operating system based on a user interface command and informs a task switching logging module when task priority inversion of the operating system needs testing, b. the task switching logging module records task switching information of the operating system, receives the notice of registering the hook function by the priority inversion test management module, and invoking the hook function when task is switched, c. the hook function tests whether priority inversion occurs on a dispatched task and tests relevant information of the priority inverted task. Further, the invention discloses a corresponding test system, and is suitable for the computer multi-task operating system.

Description

technical field [0001] The invention relates to the field of computer multi-task operating systems, in particular to a detection system and method for task priority inversion in a multi-task operating system based on task priority scheduling. Background technique [0002] In the vxWorks multitasking operating system, after a low-priority task acquires a certain mutex semaphore, it may be preempted by a high-priority task, and a task switch occurs. In order to solve this problem, when a high-priority task also wants to acquire the semaphore, the operating system will increase the priority inversion of the low-priority task to be equal to the highest priority of the task waiting for the semaphore, thus ensuring Low-priority tasks that occupy the mutex semaphore are executed first to release resources as soon as possible. In order to prevent multiple tasks from preempting the same resource and causing the system to crash, in the operating system based on priority scheduling, s...

AI Technical Summary

Problems solved by technology

In order to prevent multiple tasks from preempting the same resource and causing the system to crash, in the operating system based on priority scheduling, such task priority inversion is necessary, but sometimes, task priority inversion occurs in the operating system Finally, some problems may arise. For example, due to the long running time of some low-priority tasks, if the priority of such low-priority tasks is reversed, they cannot be preempted by high-priority tasks, resulting in high-priority tasks. to timely dispatch

Images