CPLD-PSU Power Adjustment for Server Stability
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Solution Overview
Problem
Current methods for regulating server power consumption, such as CPU throttling and CPU frequency reduction based on PSU power information, either restrict server functions or cause CPU and PSU frequency oscillations, leading to potential system crashes.
Innovation Solution
A system comprising a Power Supply Unit (PSU) and a Complex Programmable Logic Device (CPLD) that adjusts server power consumption by receiving real-time electrical signals from the server, determining the current power supply condition, and adjusting the server power accordingly to maintain optimal operation without frequency oscillations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CPU throttling is triggered by PSU Alert signal, then PSU shutdown is prevented, but server functions are restricted and power consumption is significantly reduced
Solution Approach 1:
The system dynamically adjusts CPU frequency based on real-time PSU output power conditions rather than using fixed throttling thresholds. The CPLD continuously monitors the PSU output power and adjusts the CPU frequency accordingly, allowing the system to adapt between power-saving mode and full-performance mode based on actual power availability, thus preventing both PSU shutdown and excessive function restriction.
2Ease of operation
If BMC polls PSU power information at intervals, then CPU frequency can be adjusted, but CPU frequency oscillation and PSU power oscillation occur
Solution Approach 1:
The system implements a feedback mechanism where the CPLD continuously monitors the PSU output power and adjusts the CPU frequency in real-time based on the actual power conditions. This closed-loop feedback eliminates the oscillations caused by interval polling by ensuring the CPU frequency is always synchronized with the current PSU output power state, providing both stable frequency control and responsive power adjustment.
3Use of energy by stationary object
If BMC polls PSU power information at intervals, then power consumption can be regulated, but system crash may occur due to PSU over-powering
Solution Approach 1:
The CPLD directly monitors the PSU output power and automatically adjusts the CPU frequency without requiring BMC polling. This self-service mechanism ensures that the CPU frequency is always appropriately matched with the PSU output power, preventing over-powering conditions that could cause system crashes while maintaining effective power consumption regulation.
Data Source
AI summary
A system, method, apparatus and device for adjusting power consumption, and a medium are provided. The system includes a Power Supply Unit (PSU) and a Complex Programmable Logic Device (CPLD). An input end of the PSU is connected to a server, and the PSU is configured to receive an initial electrical signal of the server in real time, and determine a current power supply condition according to the initial electrical signal to obtain a final electrical signal. The CPLD is connected to an output end of the PSU, and the CPLD is configured to receive the final electrical signal, increase a power of the server when the final electrical signal is a signal representing that the current power supply condition is high output power, and decrease the power of the server when the final electrical signal is a signal representing that the current power supply condition is low output power.