Thread Scheduling Migration for Composition Tasks
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Solution Overview
Problem
As more applications are installed or more files are stored in an electronic device, freezing may occur during application execution, reducing application smoothness and affecting user experience.
Innovation Solution
A thread scheduling method that dynamically migrates tasks of composition threads or send-for-display threads from one processing unit to another when they are in a runnable state for an extended period, reducing the likelihood of task blocking and improving device performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If thread priority is set to ensure critical tasks execute first, then task completion speed is improved, but lower-priority threads (composition/send-for-display threads) may be blocked and cause freezing
Solution Approach 1:
The patent applies dynamic thread migration to move composition threads or send-for-display threads from the first processing unit to the second processing unit when they are in a runnable state. This dynamic adjustment ensures that lower-priority threads can still execute their tasks without causing system freezing, while maintaining the priority-based scheduling for critical tasks. The migration mechanism resolves the contradiction by providing an escape route for blocked threads without compromising the speed advantage of high-priority thread execution.
2Adaptability or versatility
If more applications and files are stored in the device, then device functionality is improved, but freezing occurs during application execution reducing smoothness
Solution Approach 1:
The patent implements a dynamic thread migration mechanism that detects when composition threads or send-for-display threads are in a runnable state and migrates them to the second processing unit. This dynamic response prevents blocking and maintains application smoothness even as the number of installed applications and stored files increases. The system adapts its scheduling behavior in real-time to prevent freezing while preserving the enhanced functionality provided by multiple applications.
3Productivity
If thread migration is implemented to prevent blocking, then system smoothness is improved, but device complexity increases
Solution Approach 1:
The patent divides the processing units into two distinct segments: a first processing unit for executing high-priority critical tasks and a second processing unit for executing composition or send-for-display tasks. This segmentation allows the complex thread migration logic to be isolated and managed separately, simplifying the overall scheduling mechanism. By segmenting the processing responsibilities, the system achieves improved smoothness through targeted migration while keeping the complexity contained within a specific modular framework.
Data Source
AI summary
An electronic device receives a first operation; detects that a first thread is in a runnable state on a first processing unit, and a second thread runs on the first processing unit; and migrates a first task of the first thread to a second processing unit, so that the first thread executes, on the second processing unit, the first task associated with the first operation, where the first task includes a layer composition task or a send-for-display task. The first thread includes a composition thread or a send-for-display thread, and a priority of the first thread is lower than a priority of the second thread.