<i>S</i> <sup>3</sup>A-NPU: A High-Performance Hardware Accelerator for Spiking Self-Supervised Learning With Dynamic Adaptive Memory Optimization
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Bibliographic record
Abstract
Spiking self-supervised learning (SSL) has become prevalent for low power consumption and low-latency properties, as well as the ability to learn from large quantities of unlabeled data. However, the computational intensity and resource requirements are significant challenges to apply to accelerators. In this article, we propose the scalable, spiking self-supervised learning, streamline optimization accelerator (<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$S^{3}$</tex-math> </inline-formula>A)-neural processing unit (NPU), a highly optimized accelerator for spiking SSL models. This architecture minimizes memory access by leveraging input data provided by the user and optimizes computation through the maximization of data reuse. By dynamically optimizing memory based on model characteristics and implementing specialized operations for data preprocessing, which are critical in SSL, computational efficiency can be significantly improved. The parallel processing lanes account for the two encoders in the SSL architecture, combined with a pipelined structure that considers the temporal data accumulation of spiking neural networks (SNNs) to enhance computational efficiency. We evaluate the design on field-programmable gate array (FPGA), where a 16-bit quantized spiking residual network (ResNet) model trained on the Canadian Institute for Advanced Research (CIFAR) and MNIST dataset has top 94.08% accuracy. <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$S^{3}$</tex-math> </inline-formula>A-NPU optimization significantly improved computational resource utilization, resulting in a 25% reduction in latency. Moreover, as the first spiking self-supervised accelerator, it demonstrated highly efficient computation compared to existing accelerators, utilizing only 29k look up tables (LUTs) and eight block random access memories (BRAMs). This makes it highly suitable for resource-constrained applications, particularly in the context of spiking SSL models on edge devices. We implemented it on a silicon chip using a 130-nm process design kit (PDK), and the design was less than <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$1~\text {cm}^{2}$</tex-math> </inline-formula>.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it