PCIe Linkage Energy-Saving State Control
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Solution Overview
Problem
Current energy-saving technologies for PCI Express (PCIe) devices, which include power management (PM) and link active-state power management (ASPM), do not achieve high overall energy-saving efficiency as they implement power management states for devices and links independently, leading to suboptimal energy conservation.
Innovation Solution
A dynamic energy-saving method and apparatus for PCIe devices that obtain a system energy-saving policy and use a PCIe energy-saving module to control both devices and links to enter a corresponding linkage energy-saving state, associating device states with link states to optimize energy usage based on predefined policies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If power management (PM) and link active-state power management (ASPM) are implemented independently for PCIE devices and links, then device power management is achieved, but overall energy-saving efficiency is not high
Solution Approach 1:
The patent merges the independent power management of PCIE devices and links into a unified linkage energy-saving state. The PCIE device and its associated link are controlled together as a single entity, where the device enters a power management state D and the link enters a power management state L simultaneously, creating a coordinated energy-saving mode that improves overall efficiency while simplifying control logic.
2Ease of operation
If PCIE device enters power management state D and PCIE link enters power management state L independently, then individual state control is achieved, but linkage coordination is lost
Solution Approach 1:
The patent implements a feedback mechanism where the power management state of the PCIE device and the power management state of the link are continuously monitored and coordinated. The system detects the operational state of both device and link, and automatically adjusts their power states to maintain proper linkage coordination, ensuring that neither operates in an isolated or conflicting state.
Data Source
AI summary
The present disclosure is applicable to the field of device energy-saving control, and provides a dynamic energy-saving method and apparatus for a PCIE device, and a communication system thereof. The method includes: obtaining a system energy-saving policy; and using a PCIE energy-saving module to control a PCIE device and a PCIE link to enter a corresponding linkage energy-saving state according to the obtained system energy-saving policy. In the present disclosure, a “D” state of a PCIE device is associated with an “L” state of a link into a new linkage energy-saving state, and the device and the link are controlled to enter the corresponding linkage energy-saving state according to a preset energy-saving policy, thereby improving energy-saving efficiency.