Implementation method for software watchdog based on message monitoring

Abstract

The invention discloses an implementation method for a software watchdog based on message monitoring. The method mainly covers two parts, namely a software watchdog of an application process and a system watchdog, wherein the main core of the two parts is message monitoring, namely a method based on message interaction. The system watchdog starts with the system and is loaded in a way of a drive module, an interface which can be read and written by a monitoring process is created and is used for receiving a message of the monitoring process. The software watchdog of an application layer is used for implementation of a daemon process, the effects of the daemon process in the system are process monitoring and message distribution, all processes in the system register one watchdog message and establish a message connection channel with the daemon process, and the daemon process records status information of each process. According to the implementation method for the software watchdog based on message monitoring, the system state and the process state can be simultaneously monitored, so that the software system is more stable, compatible and reliable.

Description

technical field [0001] The invention relates to an embedded system, in particular to a method for monitoring the real-time status of the system and the running status of working processes in the system by using software to implement a watchdog in the embedded system. Background technique [0002] For software systems running embedded operating systems, in order to ensure the normal operation of the software system and the safety and stability of the system, in addition to implementing the watchdog in the hardware circuit, the software watchdog is extremely important. At present, the Linux kernel has There is a preliminary software watchdog implementation method, but there is no detailed description for the monitoring of user-level processes. [0003] Most of the implementation methods of user-level process monitoring use timers to actively send specific heartbeat messages to the monitoring process to tell the status of the main monitoring process itself. The disadvantage of ...

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Problems solved by technology

[0002] For a software system running an embedded operating system, in order to ensure the normal operation of the software system and the safety and stability of the system, in addition to implementing the watchdog in the hardware circuit, the software watchdog is extremely important. Currently, the Linux kernel has There is a preliminary software watchdog implementation method, but there is no detailed description for the monitoring of user-level processes.

[0003] Most of the implementation methods of user-level process monitoring use timers to actively send specific heartbeat messages to the monitoring process to tell the main monitoring process its own status. The disadvantage of this method is that it cannot monitor the running status of the entire system. There will also be misjudgments in monitoring (for example, the user process is too busy to send a heartbeat message to the monitoring process), which will cause the system to hang and cannot be recovered through soft restart. foreseeable system failure

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