Self-Modifying Code for Neural Network Computation Reduction
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Solution Overview
Problem
Neural networks, particularly those with dynamic iteration lengths, face inefficiencies due to processors that do not directly support dynamic control flow, leading to redundant computations and decreased workload throughput.
Innovation Solution
The implementation of self-modifying code that overwrites redundant instructions with NOP instructions during runtime, using a compiler to detect dynamic iteration patterns and generate additional instructions for evaluating break conditions, thereby reducing unnecessary computations through DMA engines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If processors execute fixed instruction sequences for neural network layers, then implementation simplicity is maintained, but redundant computations occur when break conditions are met early
Solution Approach 1:
The patent applies dynamics by making the instruction sequence dynamic through self-modifying code. Instead of executing a fixed instruction sequence, the processor dynamically modifies its own instruction stream at runtime based on break conditions. When a break condition is met, the processor overwrites subsequent instructions with NOP instructions, allowing the execution flow to adapt dynamically and eliminate redundant computations while maintaining implementation simplicity.
2Reliability
If the processor executes all compiled instructions for a neural network layer, then complete computation is ensured, but execution time increases due to redundant operations
Solution Approach 1:
The patent applies preliminary action by pre-compiling all possible instruction sequences for neural network layers, including those that may eventually become redundant. The break condition checking mechanism is embedded within these pre-compiled instructions. At runtime, when a break condition is detected, the self-modifying code immediately overwrites subsequent instructions with NOPs, preventing wasted execution time while ensuring that all necessary computations are completed beforehand in the compilation phase.
3Productivity
If dynamic control flow is implemented to reduce redundant computations, then computation efficiency improves, but processor complexity increases
Solution Approach 1:
The patent applies self-service by implementing self-modifying code that allows the processor to automatically modify its own instruction stream without external intervention. The processor includes dedicated circuitry (such as a code generation unit and instruction memory) that works autonomously to detect break conditions and overwrite subsequent instructions with NOP instructions. This self-service mechanism enables dynamic control flow and improved computation efficiency while minimizing the need for complex external control logic.
4Loss of energy
If self-modifying code is used to overwrite redundant instructions, then redundant computations are reduced, but code complexity increases
Solution Approach 1:
The patent introduces an intermediary mechanism in the form of a code generation unit and instruction memory structure that mediates between the compilation phase and execution phase. During compilation, all instructions are generated and stored in instruction memory with associated break condition logic. During execution, this intermediary structure automatically handles the self-modifying code operations by detecting break conditions and overwriting subsequent instructions with NOPs through dedicated circuitry, thereby reducing redundant computations while managing code complexity through structured intermediation rather than ad-hoc modifications.
Data Source
AI summary
In various implementations, provided are systems and methods for reducing neural network processing. A compiler may generate instructions from source code for a neural network having a repeatable set of operations. The instructions may include a plurality of blocks. The compiler may add an overwrite instruction to the plurality of blocks that, when executed by one or more execution engines, triggers an overwrite action. The overwrite action causes the instructions of subsequent blocks to be overwritten with NOP instructions. The overwrite action is triggered only when a condition is satisfied.


