Adaptive Low-Power Policy Selection for Thermal Management

The patent implements dynamic thermal throttling by transitioning from a static single-threshold policy to a dynamic multi-threshold policy that adapts to different operation scenarios. The system dynamically adjusts power reduction strategies based on real-time temperature monitoring and operational context, allowing performance to be maintained when temperatures are acceptable while applying targeted power reduction only when necessary, thus resolving the contradiction between temperature control and performance maintenance.

The patent changes the parameter structure by introducing multiple temperature thresholds (first threshold, second threshold) instead of a single threshold, and by adding operation scenario as a new parameter. This allows the system to differentiate between mild thermal conditions and critical thermal conditions, applying appropriate power reduction strategies for each scenario, thereby avoiding unnecessary performance degradation while still achieving temperature control.

The patent applies partial power reduction instead of excessive power reduction by using differentiated threshold-based strategies. When temperature exceeds the first threshold but remains below the second threshold, the system applies mild power reduction strategies that partially address the thermal issue without causing significant performance degradation. Only when temperature exceeds the second threshold does the system apply more aggressive power reduction, thus achieving temperature reduction speed while minimizing performance impact.

The system dynamically adjusts the aggressiveness of power reduction based on the operation scenario and temperature level. By monitoring both temperature and operation scenario, the system can modulate the speed of temperature reduction to match the actual thermal urgency, avoiding unnecessarily fast power reduction that would cause performance degradation while still achieving adequate temperature control.

The patent segments the control policy into operation scenario-specific sub-policies. Instead of using a single monolithic control policy, the system divides the control space into multiple operation scenarios, each with its own optimized control strategy. This segmentation allows each sub-policy to be tailored for maximum efficiency in its specific scenario while keeping the overall system manageable through automated scenario detection and policy selection.

The patent creates a universal control framework that handles multiple temperature control methods (DVFS, CPU hot-plug, task migration) through a unified multi-threshold policy structure. This universal framework maintains reduced complexity by using a consistent decision-making approach across different control methods, while achieving high control efficiency by selecting the appropriate control method and policy parameters based on the operation scenario.

The patent applies preliminary action by implementing preventive thermal management through multiple thresholds. The first threshold serves as a warning level that triggers mild power reduction strategies before the temperature reaches critical levels. This preliminary intervention prevents the need for aggressive power reduction later, allowing the system to maintain performance better while still preventing temperature from rising to dangerous levels. The second threshold provides a safety net for when preventive measures are insufficient.

The system continuously monitors temperature and operation scenario, providing real-time feedback to the control decision-making process. This feedback mechanism allows the system to adjust power reduction strategies dynamically, maintaining performance when temperatures are stable while applying necessary power reduction when temperature trends indicate potential overheating, thus balancing performance maintenance with temperature prevention.