Memory-Side Processor Diadic Operations CPU Logic Reduction
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Solution Overview
Problem
As clock frequency scaling has plateaued due to energy consumption limitations, microprocessor manufacturers need to leverage architectural improvements to enhance performance, particularly in making efficient use of memory and interconnect bandwidth to maintain performance gains without increasing clock rates.
Innovation Solution
The implementation of a Memory-Side Processor (MSP) that performs diadic operations, reducing CPU logic by moving operations into the MSP, enabling concurrent processing and reducing network bandwidth usage through diadic memory operations involving two addresses and potentially one or more data words, with a front-end decoder managing address conflicts and a diadic processing unit executing arithmetic/logical operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If operations are performed in the CPU, then processing flexibility is maintained, but CPU logic complexity increases and parallelism is reduced
Solution Approach 1:
The patent segments processing functions by separating diadic operations from the CPU and relocating them to the MSP. The CPU handles high-level control and monadic operations, while the MSP handles diadic memory operations, creating a segmented architecture that reduces CPU logic complexity while maintaining processing efficiency.
Solution Approach 2:
The MSP acts as an intermediary between the CPU and memory system. It receives requests from the CPU, performs diadic operations locally, and returns results, thereby reducing the burden on the CPU and enabling parallel processing without increasing CPU logic complexity.
2Adaptability or versatility
If more operations are performed in the CPU, then functionality is increased, but parallelism and performance are reduced
Solution Approach 1:
The patent segments operational functionality between the CPU and MSP. The CPU maintains versatility for control and monadic operations, while the MSP provides specialized diadic operation capabilities. This segmentation enables parallelism by allowing the CPU and MSP to operate independently on different task types.
Solution Approach 2:
The MSP is designed as a multi-functional unit that can perform various diadic operations (read-modify-write, arithmetic, logical operations) on memory data. This universality at the MSP level provides operational versatility without burdening the CPU, thereby enabling parallelism while maintaining functionality.
3Device complexity
If traditional memory operations are used, then simplicity is maintained, but network bandwidth usage increases
Solution Approach 1:
The patent extracts diadic operations from the traditional CPU-memory interaction path and relocates them to the MSP. By taking out these specific operations and handling them locally at the memory side, the system reduces network bandwidth usage while maintaining operational simplicity through the standardized diadic interface.
Solution Approach 2:
The MSP serves as an intermediary that handles diadic operations locally between the CPU and memory. This intermediary approach allows complex diadic operations to be performed without increasing network bandwidth usage, as the MSP processes them using local memory resources rather than requiring additional CPU-memory transactions.
4Productivity
If diadic operations are implemented in the CPU, then processing capability is enhanced, but code size increases
Solution Approach 1:
The patent extracts diadic operation logic from the CPU instruction set and relocates it to the MSP hardware. This extraction eliminates the need to encode complex diadic operations in CPU instructions, thereby reducing code size while maintaining enhanced processing capability through the MSP's specialized hardware implementation.
Data Source
AI summary
A method of performing diadic operations in a processor is provided that includes receiving a first request packet initiating a read operation from a first memory address in the first request packet, and executing a first operation in the first request packet once the read request is completed. Also, the method includes generating a second request packet at a second memory address by combining the results of the first operation with the unused information in the first request packet. Furthermore, the method includes sending the second request packet to the Memory-Side Processor (MSP). When the MSP receives the second request, the MSP checks to determine if a write operation is requested and writes data to the second memory address, if a read operation is requested, the MSP reads data from the second memory address.