Architectural Decisions for Correctness and Optimization

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Summary

This article outlines key architectural decisions made to ensure both correctness and future optimization in a system, focusing on data storage, gradient representation, vectorization, and separating correctness from performance.

Architectural Decisions for Correctness and Optimization

Highlights

Intermediate Results Storage

Intermediate results are stored in dedicated buffers, improving code clarity and preventing unintended data dependencies during convolution, despite increasing memory usage.

Gradient Component Representation

Gradient components use signed integer types to preserve directional information and prevent overflow, as Sobel responses can be both positive and negative.

Vectorization-Friendly Design

The system architecture prioritizes vectorization through data structures and memory layouts that support contiguous memory access, minimize branching, and simplify RVV strip-mining, easing future optimization and improving scalability.

Separation of Correctness and Optimization

Algorithmic correctness is separated from performance optimization, with a validated scalar implementation serving as a reference to ensure that performance enhancements do not compromise functional correctness.

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