Streaming Weight Initialization in Stacked AI Processor-Memory Circuits
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional memory controllers in stacked processor-plus-memory architectures initialize processing units by writing to individually addressed registers, which is time-consuming and imposes considerable overhead, reducing performance.
Innovation Solution
A stacked processor-plus-memory architecture that streamlines the initialization of processing elements by sequentially streaming data from memory to processing units using a sequencer and selectable buffer, accommodating variable latency and minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional memory controllers initialize processing units by writing to individually addressed registers, then each processing element can be initialized with precise control, but the initialization process becomes time-consuming and imposes considerable overhead
Solution Approach 1:
The patent segments the initialization process into two distinct phases: a configuration phase where control logic is loaded into configuration registers, and an initialization phase where processing elements are activated in a coordinated manner. This segmentation allows precise control during configuration while enabling efficient bulk initialization during the activation phase, resolving the contradiction between control precision and initialization time.
Solution Approach 2:
The patent performs preliminary configuration of control logic in configuration registers before the actual initialization of processing elements. By pre-configuring the control logic that governs initialization behavior, the system establishes precise control mechanisms in advance, which then enable efficient coordinated initialization of multiple processing elements simultaneously, reducing overall initialization time while maintaining control precision.
2Ease of manufacture
If traditional memory controllers use individually addressed register writes for initialization, then each processing element receives its data sequentially, but this approach reduces overall system performance
Solution Approach 1:
The patent merges the initialization operations of multiple processing elements into a coordinated sequence controlled by shared control logic in the configuration registers. Instead of treating each processing element initialization as a separate sequential operation, the control logic orchestrates simultaneous or pipelined initialization across multiple elements, maintaining process simplicity while dramatically improving system performance through parallelism.
Solution Approach 2:
The configuration registers serve multiple functions: they store control logic for coordinating initialization sequences, manage data flow distribution to multiple processing elements, and enable both sequential and parallel initialization modes. This multi-functionality allows the same hardware structure to maintain simplicity while achieving high performance through flexible initialization strategies.
3Quantity of substance
If data is chunked for initialization in traditional architectures, then memory bandwidth can be managed, but this chunking process adds complexity and overhead to the initialization procedure
Solution Approach 1:
The patent extracts the data chunking and management logic from the processing element initialization process and places it in the configuration registers of the memory controller. By moving this functionality to the controller side, the processing elements themselves remain simple and do not require complex chunking logic, reducing overall system complexity while still enabling efficient data transfer volume management through controller-side control.
Data Source
AI summary
A stacked processor-plus-memory device includes a processing die with an array of processing elements of an artificial neural network. Each processing element multiplies a first operand—e.g. a weight—by a second operand to produce a partial result to a subsequent processing element. To prepare for these computations, a sequencer loads the weights into the processing elements as a sequence of operands that step through the processing elements, each operand stored in the corresponding processing element. The operands can be sequenced directly from memory to the processing elements or can be stored first in cache. The processing elements include streaming logic that disregards interruptions in the stream of operands.