Power Management Controller for Undersized Supply Shutdown Prevention
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Solution Overview
Problem
Information handling systems often face undesirable 'dirty' shutdowns due to undersized power supplies, which fail to meet the worst-case electrical loads, particularly when user-installed components like PCI and PCIe devices exceed power budget limits.
Innovation Solution
An information handling system with a management controller that creates an inventory of resources, determines the worst-case maximum power consumption, and takes remedial actions to maintain power consumption below the power limit, preventing shutdowns by throttling components like the processor and USB interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power supply is sized for absolute worst-case system loading, then system reliability is improved, but cost increases due to oversizing
Solution Approach 1:
The management controller performs preliminary identification and inventory of power-consuming components before worst-case loading occurs. By creating a detailed inventory of installed PCI/PCIe devices and their power requirements, the system can proactively manage power distribution and prevent dirty shutdowns before they happen, rather than relying on oversized power supplies.
Solution Approach 2:
The system continuously monitors actual power consumption against the inventory data and adjusts power allocation dynamically. The management controller compares real-time power usage with the predetermined power limits for each component, providing feedback that enables adaptive power management and prevents system shutdowns without requiring oversizing the power supply capacity.
2Quantity of substance
If power supply is undersized to reduce cost, then cost decreases, but system reliability deteriorates due to dirty shutdown
Solution Approach 1:
The system performs preliminary identification and inventory of power-consuming components before worst-case loading occurs. By creating a detailed inventory of installed PCI/PCIe devices and their power requirements, the system can proactively manage power distribution and prevent dirty shutdowns before they happen, rather than relying on oversized power supplies.
Solution Approach 2:
The system continuously monitors actual power consumption against the inventory data and adjusts power allocation dynamically. The management controller compares real-time power usage with the predetermined power limits for each component, providing feedback that enables adaptive power management and prevents system shutdowns without requiring oversizing the power supply capacity.
3Productivity
If user-installed components are allowed to maximize performance, then system performance is improved, but power consumption increases risking dirty shutdown
Solution Approach 1:
The system dynamically adjusts power allocation to user-installed PCI/PCIe devices based on their actual operational needs rather than providing fixed maximum power. The management controller monitors component usage patterns and adjusts power delivery in real-time, allowing high performance when needed while preventing total power consumption from exceeding supply capacity, thus avoiding dirty shutdowns.
Solution Approach 2:
The system changes power consumption parameters of installed components based on system conditions. The management controller modifies power allocation parameters for PCI/PCIe devices dynamically, adjusting voltage, current, or operational modes to optimize performance while maintaining total power consumption within safe limits.
Data Source
AI summary
An information handling system may include a processor, a plurality of information handling resources communicatively coupled to the processor, a power subsystem configured to deliver electrical energy to the processor and the plurality of information handling resources to enable operation of the processor and the plurality of information handling resources and a management controller. The management controller may be configured to create an inventory of the plurality of information handling resources; based on the inventory, determine a worst-case maximum power consumption of the processor and the plurality of information handling resources; determine if the worst-case maximum power consumption exceeds a power limit associated with the power subsystem; and if the worst-case maximum power consumption exceeds the power limit, cause a remedial action to be taken to maintain power consumption of the processor and the plurality of information handling resources below the power limit.