Real-time scheduling system of embedded virtual machine (VM)

Abstract

The invention discloses a real-time scheduling system of an embedded virtual machine (VM), comprising a time synchronization and appointment module, a task information updating scheduling triggering module, a task resource monitoring scheduling triggering module, an operating system interior scheduling module, a timer module 1S, a task information collecting module, a resource recovering module and a task scheduling module. The time synchronization and appointment module, the task information updating scheduling triggering module, the task resource monitoring scheduling triggering module and the operating system interior scheduling module are located in each VM and take charge of collecting information and triggering the virtual machine manager (VMM) to update and schedule information; the timer module 1S, the task information collecting module, the resource recovering module and the task scheduling module are located in each VMM and take charge of counting and managing the task information of each VM, making the final VMM layer scheduling strategy through the task scheduling module and supervising the real-time scheduling process in each VM operating system. The open real-time scheduling system has low cost, high utilization rate and high real-time performance. In addition, the open real-time scheduling system realizes the expandable optimization by using a detachable server and fully utilizes the virtual security and isolation characteristics are fully utilized, thereby having high reliability and high throughput.

Description

technical field [0001] The invention belongs to the field of embedded virtualization system structure, and in particular relates to a real-time scheduling of an embedded virtual machine based on Xen ARM (Xen is an open source virtual machine project of Cambridge University, and XenARM is an open source version transplanted to the ARM architecture). The system can not only meet the rich application requirements of embedded virtualization systems, but also have real-time characteristics. Background technique [0002] The current embedded application is facing new demands, it must also meet the rich human-computer interaction application based on the basic real-time performance of the previous embedded system. The traditional RTOS (real-time operating system) has the real-time characteristics of high real-time, low-latency interrupt, and efficient process communication, but it lacks rich applications. The traditional GPOS (general-purpose operating system in the traditional se...

AI Technical Summary

Problems solved by technology

[0013] The present invention aims at the new requirements of embedded Internet for real-time and rich applications, combined with server virtualization technology, and aiming at the defect that the current real-time performance cannot meet the needs, a real-time scheduling system for embedded virtual machines is proposed. The virtual machine scheduler can perceive the real-time tasks in each VM, realize global task scheduling through the combination of response ratio priority and EDF algorithm, and meet the real-time requirements of time-driven tasks and event-driven tasks to a certain extent

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