Compiler Inserted Power Alerts for Mobile Subsystem Warm-up
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Solution Overview
Problem
Existing device power management techniques fail to keep device subsystems in a powered-off state for extended periods without causing user-perceived lag when needed for operation, as they require time to warm up, affecting energy consumption and operational efficiency.
Innovation Solution
Incorporating a device power management alert into the instruction stream during compilation of thin binaries, which alerts device subsystems to power up before being called, allowing them to be ready for use without delay, thereby maximizing downtime while minimizing user experience impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If device subsystems are kept in a powered-off state to reduce energy consumption, then battery life is prolonged and operating cost is reduced, but the subsystems require warm-up time when needed for operation causing user-perceived lag
Solution Approach 1:
The compiler inserts power management alerts into the instruction stream in advance, before the actual subsystem call is executed. This preliminary action allows the subsystem to begin warming up before it is actually needed, eliminating user-perceived lag while maintaining the ability to keep subsystems powered off for extended periods when not needed.
Solution Approach 2:
A power management alert is introduced as an intermediary element between the main execution flow and the subsystem call. This alert acts as a mediator that triggers the subsystem to transition from a powered-off state to a ready state, coordinating the warm-up process with the actual need for subsystem operation.
2Duration of action of stationary object
If device subsystems are kept in a powered-off state for greater periods of time, then energy consumption is reduced and battery life is prolonged, but the device operation may experience lag time when subsystems are needed
Solution Approach 1:
The system performs preliminary actions by inserting power management alerts into the compiled instruction stream. These alerts are executed before the subsystem is actually called, initiating the warm-up process in advance. This allows the subsystem to remain powered off for maximum duration while still being ready when needed, resolving the contradiction between extended downtime and operational responsiveness.
3Speed
If device subsystems are warmed up before use to eliminate lag, then operational responsiveness is improved, but energy consumption increases and battery life decreases
Solution Approach 1:
The compiler inserts power management alerts at specific points in the instruction stream, allowing subsystems to warm up only when actually needed based on the program's execution flow. This selective preliminary action improves subsystem readiness speed only when necessary, rather than continuously warming up subsystems, thereby minimizing unnecessary energy consumption while maintaining operational responsiveness when required.
Data Source
AI summary
Technologies and implementations for device power management using compiler inserted device alerts are generally disclosed. In an example, a thin binary including a call to a device subsystem may be compiled at the device to produce an instruction stream including a device power management alert for the device subsystem inserted in the instruction stream before a call to the device subsystem.