Power Management System PS4 Exit State Transition
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Solution Overview
Problem
Modern power management systems in information handling systems, such as CPUs, consume unnecessary power when exiting the deep sleep state (PS4/C10) due to immediate transition to high power 'turbo' state for task completion, which is not complex.
Innovation Solution
A power management system that includes a core rail, a GT rail, and a VR thermal indicative pin, where the VR thermal indicative pin is pulled down for a preset time duration when the core rail exits the PS4 state, or until the GT rail exits the PS4 state, to reduce power consumption by potentially entering a low-frequency working mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the power management system immediately transitions to high power 'turbo' state when exiting PS4/C10 state, then task completion speed is improved, but power consumption increases unnecessarily
Solution Approach 1:
The patent implements dynamic state transition by introducing intermediate frequency states between deep sleep and full turbo mode. The system dynamically adjusts the operating frequency based on actual task requirements, allowing smooth transitions through multiple power states rather than immediate jump to maximum power, thereby reducing unnecessary energy consumption while maintaining adequate task completion speed.
Solution Approach 2:
The patent changes the power state parameters by introducing gradual frequency scaling during exit from PS4/C10 state. Instead of fixed immediate transition to maximum frequency, the system modifies frequency parameters progressively through intermediate states, enabling task completion with optimized power consumption by matching frequency levels to actual computational needs.
2Use of energy by moving object
If the VR thermal indicative pin is pulled down to enter low-frequency mode, then power consumption is reduced, but task completion time may increase
Solution Approach 1:
The patent applies partial action by using low-frequency mode only when task complexity is low. The system assesses task requirements and selectively applies power-saving frequency states for simple tasks, while reserving higher frequency states for complex tasks. This partial application of low-frequency mode reduces power consumption for appropriate workloads without significantly impacting overall task completion time.
Data Source
AI summary
A power management system having: a core rail, configured to provide a core voltage to a core; a GT rail, configured to provide a GT voltage to a graphic terminal; and a VR thermal indicative pin, coupled to a core thermal indicative pin of the core; wherein the VR thermal indicative pin is pulled down for a preset time duration once the core rail is commanded to exit a PS4 state, or for a time duration beginning when the core rail is commanded to exit the PS4 state ending when the GT rail is commanded to exit the PS4 state.