CXL Memory Module Thermal Management via Segmentation
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Solution Overview
Problem
The challenge in mobile computing devices is to balance the size constraints with the need for processing, memory, storage, and battery components, leading to increased temperatures and reduced performance due to compact form factors.
Innovation Solution
A Compute Express Link (CXL) compliant memory sub-system that integrates volatile and non-volatile memory resources on a single module, utilizing a controller to communicate with the host device and perform operations locally, reducing the need for external caches and interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If memory devices are integrated into mobile computing devices with compact form factors, then the device size is reduced, but temperature increases and performance decreases
Solution Approach 1:
The memory system is segmented into multiple independent memory devices (first memory device and second memory device) that can be selectively activated. This segmentation allows the system to distribute thermal load across multiple smaller units rather than concentrating all memory operations in a single compact unit, thereby managing temperature while maintaining compact form factor.
Solution Approach 2:
The system dynamically selects which memory device to use based on operational requirements. The controller can switch between the first memory device and the second memory device, enabling flexible thermal management by activating only the necessary portion of the memory system at any given time, thus reducing overall heat generation while maintaining performance.
2Productivity
If multiple memory devices are used to maintain performance, then processing capability is improved, but pin count and power consumption increase
Solution Approach 1:
The system employs partial action by activating only one memory device at a time rather than using all available memory resources simultaneously. The controller selectively engages the first or second memory device based on current workload requirements, consuming power only for the actively used memory unit while maintaining the capability to scale performance when needed.
3Speed
If external caches and interfaces are used in traditional memory systems, then data transfer capability is improved, but device complexity and pin count increase
Solution Approach 1:
The first memory device and second memory device are merged into a single unified memory system managed by one controller. This consolidation eliminates the need for separate external caches and multiple independent interfaces that would otherwise be required to manage multiple memory subsystems, thereby reducing device complexity and pin count while maintaining data transfer capability through the unified architecture.
Data Source
AI summary
An apparatus can include control circuitry, a non-volatile memory device, and a volatile memory device. The control circuitry can be configured to receive a command presented according to a compute express link (CXL) protocol. The control circuitry can be further configured to cause data to be written to the non-volatile memory device or the volatile memory device, or both, in response to receipt of the command while refraining from writing the data to a cache that is external to the apparatus.